{
  "document" : {
    "aggregate_severity" : {
      "namespace" : "https://access.redhat.com/security/updates/classification/",
      "text" : "Important"
    },
    "category" : "csaf_security_advisory",
    "csaf_version" : "2.0",
    "distribution" : {
      "text" : "Copyright © Red Hat, Inc. All rights reserved.",
      "tlp" : {
        "label" : "WHITE",
        "url" : "https://www.first.org/tlp/"
      }
    },
    "lang" : "en",
    "notes" : [ {
      "category" : "summary",
      "text" : "An update for libX11 is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
      "title" : "Topic"
    }, {
      "category" : "general",
      "text" : "The libX11 packages contain the core X11 protocol client library.\n\nSecurity Fix(es):\n\n* libX11: libX11: Heap-based buffer overflow via malicious X server (CVE-2026-88806)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
      "title" : "Details"
    }, {
      "category" : "legal_disclaimer",
      "text" : "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
      "title" : "Terms of Use"
    } ],
    "publisher" : {
      "category" : "vendor",
      "contact_details" : "https://access.redhat.com/security/team/contact/",
      "issuing_authority" : "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name" : "Red Hat Product Security",
      "namespace" : "https://www.redhat.com"
    },
    "references" : [ {
      "category" : "self",
      "summary" : "https://access.redhat.com/errata/RHSA-2026:95499",
      "url" : "https://access.redhat.com/errata/RHSA-2026:95499"
    }, {
      "category" : "external",
      "summary" : "https://access.redhat.com/security/updates/classification/#important",
      "url" : "https://access.redhat.com/security/updates/classification/#important"
    }, {
      "category" : "external",
      "summary" : "2538514",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2538514"
    }, {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_95499.json"
    } ],
    "title" : "Red Hat Security Advisory: libX11 security update",
    "tracking" : {
      "current_release_date" : "2026-11-11T13:03:58+00:00",
      "generator" : {
        "date" : "2026-11-11T13:03:58+00:00",
        "engine" : {
          "name" : "Red Hat SDEngine",
          "version" : "5.4.5"
        }
      },
      "id" : "RHSA-2026:95499",
      "initial_release_date" : "2026-11-05T12:40:20+00:00",
      "revision_history" : [ {
        "date" : "2026-11-05T12:40:20+00:00",
        "number" : "1",
        "summary" : "Initial version"
      }, {
        "date" : "2026-11-05T12:40:20+00:00",
        "number" : "2",
        "summary" : "Last updated version"
      }, {
        "date" : "2026-11-11T13:03:58+00:00",
        "number" : "3",
        "summary" : "Last generated version"
      } ],
      "status" : "final",
      "version" : "3"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_name",
          "name" : "Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
          "product" : {
            "name" : "Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
            "product_id" : "AppStream-10.0.Z.E2S",
            "product_identification_helper" : {
              "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0"
            }
          }
        } ],
        "category" : "product_family",
        "name" : "Red Hat Enterprise Linux"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "libX11-0:1.8.10-1.el10_0.1.src",
          "product" : {
            "name" : "libX11-0:1.8.10-1.el10_0.1.src",
            "product_id" : "libX11-0:1.8.10-1.el10_0.1.src",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11@1.8.10-1.el10_0.1?arch=src"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "src"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "libX11-0:1.8.10-1.el10_0.1.aarch64",
          "product" : {
            "name" : "libX11-0:1.8.10-1.el10_0.1.aarch64",
            "product_id" : "libX11-0:1.8.10-1.el10_0.1.aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11@1.8.10-1.el10_0.1?arch=aarch64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-devel-0:1.8.10-1.el10_0.1.aarch64",
          "product" : {
            "name" : "libX11-devel-0:1.8.10-1.el10_0.1.aarch64",
            "product_id" : "libX11-devel-0:1.8.10-1.el10_0.1.aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-devel@1.8.10-1.el10_0.1?arch=aarch64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.aarch64",
          "product" : {
            "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.aarch64",
            "product_id" : "libX11-xcb-0:1.8.10-1.el10_0.1.aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-xcb@1.8.10-1.el10_0.1?arch=aarch64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64",
          "product" : {
            "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64",
            "product_id" : "libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-debugsource@1.8.10-1.el10_0.1?arch=aarch64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64",
          "product" : {
            "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64",
            "product_id" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-debuginfo@1.8.10-1.el10_0.1?arch=aarch64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64",
          "product" : {
            "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64",
            "product_id" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-xcb-debuginfo@1.8.10-1.el10_0.1?arch=aarch64"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "aarch64"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "libX11-0:1.8.10-1.el10_0.1.ppc64le",
          "product" : {
            "name" : "libX11-0:1.8.10-1.el10_0.1.ppc64le",
            "product_id" : "libX11-0:1.8.10-1.el10_0.1.ppc64le",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11@1.8.10-1.el10_0.1?arch=ppc64le"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-devel-0:1.8.10-1.el10_0.1.ppc64le",
          "product" : {
            "name" : "libX11-devel-0:1.8.10-1.el10_0.1.ppc64le",
            "product_id" : "libX11-devel-0:1.8.10-1.el10_0.1.ppc64le",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-devel@1.8.10-1.el10_0.1?arch=ppc64le"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le",
          "product" : {
            "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le",
            "product_id" : "libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-xcb@1.8.10-1.el10_0.1?arch=ppc64le"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le",
          "product" : {
            "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le",
            "product_id" : "libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-debugsource@1.8.10-1.el10_0.1?arch=ppc64le"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le",
          "product" : {
            "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le",
            "product_id" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-debuginfo@1.8.10-1.el10_0.1?arch=ppc64le"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le",
          "product" : {
            "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le",
            "product_id" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-xcb-debuginfo@1.8.10-1.el10_0.1?arch=ppc64le"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "ppc64le"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "libX11-0:1.8.10-1.el10_0.1.s390x",
          "product" : {
            "name" : "libX11-0:1.8.10-1.el10_0.1.s390x",
            "product_id" : "libX11-0:1.8.10-1.el10_0.1.s390x",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11@1.8.10-1.el10_0.1?arch=s390x"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-devel-0:1.8.10-1.el10_0.1.s390x",
          "product" : {
            "name" : "libX11-devel-0:1.8.10-1.el10_0.1.s390x",
            "product_id" : "libX11-devel-0:1.8.10-1.el10_0.1.s390x",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-devel@1.8.10-1.el10_0.1?arch=s390x"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.s390x",
          "product" : {
            "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.s390x",
            "product_id" : "libX11-xcb-0:1.8.10-1.el10_0.1.s390x",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-xcb@1.8.10-1.el10_0.1?arch=s390x"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.s390x",
          "product" : {
            "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.s390x",
            "product_id" : "libX11-debugsource-0:1.8.10-1.el10_0.1.s390x",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-debugsource@1.8.10-1.el10_0.1?arch=s390x"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x",
          "product" : {
            "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x",
            "product_id" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-debuginfo@1.8.10-1.el10_0.1?arch=s390x"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x",
          "product" : {
            "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x",
            "product_id" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-xcb-debuginfo@1.8.10-1.el10_0.1?arch=s390x"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "s390x"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "libX11-0:1.8.10-1.el10_0.1.x86_64",
          "product" : {
            "name" : "libX11-0:1.8.10-1.el10_0.1.x86_64",
            "product_id" : "libX11-0:1.8.10-1.el10_0.1.x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11@1.8.10-1.el10_0.1?arch=x86_64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-devel-0:1.8.10-1.el10_0.1.x86_64",
          "product" : {
            "name" : "libX11-devel-0:1.8.10-1.el10_0.1.x86_64",
            "product_id" : "libX11-devel-0:1.8.10-1.el10_0.1.x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-devel@1.8.10-1.el10_0.1?arch=x86_64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.x86_64",
          "product" : {
            "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.x86_64",
            "product_id" : "libX11-xcb-0:1.8.10-1.el10_0.1.x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-xcb@1.8.10-1.el10_0.1?arch=x86_64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64",
          "product" : {
            "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64",
            "product_id" : "libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-debugsource@1.8.10-1.el10_0.1?arch=x86_64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64",
          "product" : {
            "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64",
            "product_id" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-debuginfo@1.8.10-1.el10_0.1?arch=x86_64"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64",
          "product" : {
            "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64",
            "product_id" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-xcb-debuginfo@1.8.10-1.el10_0.1?arch=x86_64"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "x86_64"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "libX11-common-0:1.8.10-1.el10_0.1.noarch",
          "product" : {
            "name" : "libX11-common-0:1.8.10-1.el10_0.1.noarch",
            "product_id" : "libX11-common-0:1.8.10-1.el10_0.1.noarch",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libX11-common@1.8.10-1.el10_0.1?arch=noarch"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "noarch"
      } ],
      "category" : "vendor",
      "name" : "Red Hat"
    } ],
    "relationships" : [ {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-0:1.8.10-1.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.aarch64"
      },
      "product_reference" : "libX11-0:1.8.10-1.el10_0.1.aarch64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-0:1.8.10-1.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.ppc64le"
      },
      "product_reference" : "libX11-0:1.8.10-1.el10_0.1.ppc64le",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-0:1.8.10-1.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.s390x"
      },
      "product_reference" : "libX11-0:1.8.10-1.el10_0.1.s390x",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-0:1.8.10-1.el10_0.1.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.src"
      },
      "product_reference" : "libX11-0:1.8.10-1.el10_0.1.src",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-0:1.8.10-1.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.x86_64"
      },
      "product_reference" : "libX11-0:1.8.10-1.el10_0.1.x86_64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-common-0:1.8.10-1.el10_0.1.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-common-0:1.8.10-1.el10_0.1.noarch"
      },
      "product_reference" : "libX11-common-0:1.8.10-1.el10_0.1.noarch",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64"
      },
      "product_reference" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le"
      },
      "product_reference" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x"
      },
      "product_reference" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64"
      },
      "product_reference" : "libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64"
      },
      "product_reference" : "libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le"
      },
      "product_reference" : "libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.s390x"
      },
      "product_reference" : "libX11-debugsource-0:1.8.10-1.el10_0.1.s390x",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64"
      },
      "product_reference" : "libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-devel-0:1.8.10-1.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.aarch64"
      },
      "product_reference" : "libX11-devel-0:1.8.10-1.el10_0.1.aarch64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-devel-0:1.8.10-1.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.ppc64le"
      },
      "product_reference" : "libX11-devel-0:1.8.10-1.el10_0.1.ppc64le",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-devel-0:1.8.10-1.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.s390x"
      },
      "product_reference" : "libX11-devel-0:1.8.10-1.el10_0.1.s390x",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-devel-0:1.8.10-1.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.x86_64"
      },
      "product_reference" : "libX11-devel-0:1.8.10-1.el10_0.1.x86_64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.aarch64"
      },
      "product_reference" : "libX11-xcb-0:1.8.10-1.el10_0.1.aarch64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le"
      },
      "product_reference" : "libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.s390x"
      },
      "product_reference" : "libX11-xcb-0:1.8.10-1.el10_0.1.s390x",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-xcb-0:1.8.10-1.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.x86_64"
      },
      "product_reference" : "libX11-xcb-0:1.8.10-1.el10_0.1.x86_64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64"
      },
      "product_reference" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le"
      },
      "product_reference" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x"
      },
      "product_reference" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
        "product_id" : "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64"
      },
      "product_reference" : "libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64",
      "relates_to_product_reference" : "AppStream-10.0.Z.E2S"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2026-88806",
    "cwe" : {
      "id" : "CWE-787",
      "name" : "Out-of-bounds Write"
    },
    "discovery_date" : "2026-09-22T18:47:16.244674+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2538514"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in libX11. A heap-based buffer overflow vulnerability exists during the handling of XkbGetMap replies. A remote attacker, by operating a malicious X server, could exploit this flaw to potentially execute arbitrary code or cause a denial of service on the client system. User interaction is required for exploitation.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "libX11: libX11: Heap-based buffer overflow via malicious X server",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "Red Hat Product Security rates this vulnerability as Important because an attacker operating a rogue or compromised X server can trigger memory corruption, potentially leading to arbitrary code execution with the permissions of the connecting client application. In typical Red Hat Enterprise Linux deployments, graphical applications communicate over trusted local sockets to the local display server, substantially restricting attack vectors. However, risk increases in scenarios where users connect to untrusted remote displays or employ unverified remote X11 session forwarding.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
    "product_status" : {
      "fixed" : [ "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.src", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-common-0:1.8.10-1.el10_0.1.noarch", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64" ]
    },
    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-88806"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2538514",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2538514"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-88806",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-88806"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-88806",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-88806"
    }, {
      "category" : "external",
      "summary" : "https://gitlab.freedesktop.org/xorg/lib/libx11/-/merge_requests/309",
      "url" : "https://gitlab.freedesktop.org/xorg/lib/libx11/-/merge_requests/309"
    } ],
    "release_date" : "2026-09-21T13:42:12.700000+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-11-05T12:40:20+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
      "product_ids" : [ "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.src", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-common-0:1.8.10-1.el10_0.1.noarch", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64" ],
      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:95499"
    }, {
      "category" : "workaround",
      "details" : "To mitigate this issue, users should avoid connecting to untrusted X servers. When using SSH, ensure that X11 forwarding (`ssh -X` or `ssh -Y`) is only enabled for trusted remote hosts. To prevent X11 forwarding for specific hosts, add `ForwardX11 no` to the relevant host entry in `~/.ssh/config` or `/etc/ssh/ssh_config`. Alternatively, disable X11 forwarding globally by setting `ForwardX11 no` in `/etc/ssh/ssh_config`.",
      "product_ids" : [ "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.src", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-common-0:1.8.10-1.el10_0.1.noarch", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64" ]
    } ],
    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "HIGH",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 7.5,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "HIGH",
        "integrityImpact" : "HIGH",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "REQUIRED",
        "vectorString" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
        "version" : "3.1"
      },
      "products" : [ "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.src", "AppStream-10.0.Z.E2S:libX11-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-common-0:1.8.10-1.el10_0.1.noarch", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-debuginfo-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-debugsource-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-devel-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-xcb-0:1.8.10-1.el10_0.1.x86_64", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.aarch64", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.ppc64le", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.s390x", "AppStream-10.0.Z.E2S:libX11-xcb-debuginfo-0:1.8.10-1.el10_0.1.x86_64" ]
    } ],
    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "libX11: libX11: Heap-based buffer overflow via malicious X server"
  } ]
}