{
  "document" : {
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      "namespace" : "https://access.redhat.com/security/updates/classification/",
      "text" : "Moderate"
    },
    "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 Red Hat Hardened Images RPMs is now available.",
      "title" : "Topic"
    }, {
      "category" : "general",
      "text" : "This update includes the following RPMs:\n\nlibpng:\n  * libpng-1.6.57-0.1.hum1 (aarch64, x86_64)\n  * libpng-devel-1.6.57-0.1.hum1 (aarch64, x86_64)\n  * libpng-static-1.6.57-0.1.hum1 (aarch64, x86_64)\n  * libpng-tools-1.6.57-0.1.hum1 (aarch64, x86_64)\n  * libpng-1.6.57-0.1.hum1.src (src)\n\nSecurity Fix(es):\n\nlibpng:\n  * CVE-2026-34757",
      "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-2026:13719",
      "url" : "https://access.redhat.com/errata/RHSA-2026:13719"
    }, {
      "category" : "external",
      "summary" : "https://access.redhat.com/security/cve/CVE-2026-34757",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-34757"
    }, {
      "category" : "external",
      "summary" : "https://access.redhat.com/security/updates/classification/",
      "url" : "https://access.redhat.com/security/updates/classification/"
    }, {
      "category" : "external",
      "summary" : "https://images.redhat.com/",
      "url" : "https://images.redhat.com/"
    }, {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_13719.json"
    } ],
    "title" : "Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update",
    "tracking" : {
      "current_release_date" : "2026-05-13T23:13:14+00:00",
      "generator" : {
        "date" : "2026-05-13T23:13:14+00:00",
        "engine" : {
          "name" : "Red Hat SDEngine",
          "version" : "4.7.9"
        }
      },
      "id" : "RHSA-2026:13719",
      "initial_release_date" : "2026-05-05T11:30:45+00:00",
      "revision_history" : [ {
        "date" : "2026-05-05T11:30:45+00:00",
        "number" : "1",
        "summary" : "Initial version"
      }, {
        "date" : "2026-05-05T11:32:15+00:00",
        "number" : "2",
        "summary" : "Last updated version"
      }, {
        "date" : "2026-05-13T23:13:14+00:00",
        "number" : "3",
        "summary" : "Last generated version"
      } ],
      "status" : "final",
      "version" : "3"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_name",
          "name" : "Red Hat Hardened Images",
          "product" : {
            "name" : "Red Hat Hardened Images",
            "product_id" : "Red Hat Hardened Images",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:redhat:hummingbird:1"
            }
          }
        } ],
        "category" : "product_family",
        "name" : "Red Hat Hardened Images"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "libpng-main@aarch64",
          "product" : {
            "name" : "libpng-main@aarch64",
            "product_id" : "libpng-main@aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libpng@1.6.57-0.1.hum1?arch=aarch64&distro=hummingbird-20251124&repository_id=public-hummingbird-aarch64-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "aarch64"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "libpng-main@src",
          "product" : {
            "name" : "libpng-main@src",
            "product_id" : "libpng-main@src",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libpng@1.6.57-0.1.hum1?arch=src&distro=hummingbird-20251124&repository_id=public-hummingbird-source-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "src"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "libpng-main@x86_64",
          "product" : {
            "name" : "libpng-main@x86_64",
            "product_id" : "libpng-main@x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/libpng@1.6.57-0.1.hum1?arch=x86_64&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "x86_64"
      } ],
      "category" : "vendor",
      "name" : "Red Hat"
    } ],
    "relationships" : [ {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libpng-main@aarch64 as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:libpng-main@aarch64"
      },
      "product_reference" : "libpng-main@aarch64",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libpng-main@src as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:libpng-main@src"
      },
      "product_reference" : "libpng-main@src",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "libpng-main@x86_64 as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:libpng-main@x86_64"
      },
      "product_reference" : "libpng-main@x86_64",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2026-34757",
    "cwe" : {
      "id" : "CWE-825",
      "name" : "Expired Pointer Dereference"
    },
    "discovery_date" : "2026-04-09T15:02:17.900673+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2456918"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in libpng, a library used for handling PNG (Portable Network Graphics) image files. This vulnerability arises when an application reuses a pointer, previously obtained from functions like png_get_PLTE, by passing it back to a corresponding setter function within the same image structure. This action causes the setter to access memory that has already been deallocated, leading to a use-after-free condition. A local attacker could potentially exploit this flaw to corrupt image metadata or disclose sensitive information from the application's memory.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "libpng: libpng: Information disclosure and data corruption via use-after-free vulnerability",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "There's a use-after-free vulnerability in libpng. The flaw occurs when an application reuses a pointer from `png_get_PLTE`, `png_get_tRNS`, or `png_get_hIST` and passes it to a corresponding setter, leading to memory corruption or information disclosure. A local attacker could exploit this if a vulnerable application processes PNG files in this specific manner.\nRed Hat Product Security team has rated this as having a moderate impact as the user needs to be tricked to open the maliciously crafted PNG image, additionally the attacker doesn't have full control if the content it's exfiltrating or corruption in the memory.",
      "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" : [ "Red Hat Hardened Images:libpng-main@aarch64", "Red Hat Hardened Images:libpng-main@src", "Red Hat Hardened Images:libpng-main@x86_64" ]
    },
    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-34757"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2456918",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2456918"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-34757",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-34757"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34757",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34757"
    }, {
      "category" : "external",
      "summary" : "https://github.com/pnggroup/libpng/commit/398cbe3df03f4e11bb031e07f416dfdde3684e8a",
      "url" : "https://github.com/pnggroup/libpng/commit/398cbe3df03f4e11bb031e07f416dfdde3684e8a"
    }, {
      "category" : "external",
      "summary" : "https://github.com/pnggroup/libpng/commit/55d20aaa322c9274491cda82c5cd4f99b48c6bcc",
      "url" : "https://github.com/pnggroup/libpng/commit/55d20aaa322c9274491cda82c5cd4f99b48c6bcc"
    }, {
      "category" : "external",
      "summary" : "https://github.com/pnggroup/libpng/issues/836",
      "url" : "https://github.com/pnggroup/libpng/issues/836"
    }, {
      "category" : "external",
      "summary" : "https://github.com/pnggroup/libpng/issues/837",
      "url" : "https://github.com/pnggroup/libpng/issues/837"
    }, {
      "category" : "external",
      "summary" : "https://github.com/pnggroup/libpng/security/advisories/GHSA-6fr7-g8h7-v645",
      "url" : "https://github.com/pnggroup/libpng/security/advisories/GHSA-6fr7-g8h7-v645"
    } ],
    "release_date" : "2026-04-09T14:41:18.195000+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-05-05T11:30:45+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
      "product_ids" : [ "Red Hat Hardened Images:libpng-main@aarch64", "Red Hat Hardened Images:libpng-main@src", "Red Hat Hardened Images:libpng-main@x86_64" ],
      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:13719"
    }, {
      "category" : "workaround",
      "details" : "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
      "product_ids" : [ "Red Hat Hardened Images:libpng-main@aarch64", "Red Hat Hardened Images:libpng-main@src", "Red Hat Hardened Images:libpng-main@x86_64" ]
    } ],
    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "LOCAL",
        "availabilityImpact" : "NONE",
        "baseScore" : 4.4,
        "baseSeverity" : "MEDIUM",
        "confidentialityImpact" : "LOW",
        "integrityImpact" : "LOW",
        "privilegesRequired" : "LOW",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
        "version" : "3.1"
      },
      "products" : [ "Red Hat Hardened Images:libpng-main@aarch64", "Red Hat Hardened Images:libpng-main@src", "Red Hat Hardened Images:libpng-main@x86_64" ]
    } ],
    "threats" : [ {
      "category" : "impact",
      "details" : "Moderate"
    } ],
    "title" : "libpng: libpng: Information disclosure and data corruption via use-after-free vulnerability"
  } ]
}