{
  "public_date" : "2026-04-06T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: ksmbd: unset conn->binding on failed binding request",
    "id" : "2455337",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2455337"
  },
  "cwe" : "CWE-390",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nksmbd: unset conn->binding on failed binding request\nWhen a multichannel SMB2_SESSION_SETUP request with\nSMB2_SESSION_REQ_FLAG_BINDING fails ksmbd sets conn->binding = true\nbut never clears it on the error path. This leaves the connection in\na binding state where all subsequent ksmbd_session_lookup_all() calls\nfall back to the global sessions table. This fix it by clearing\nconn->binding = false in the error path.", "A flaw was found in ksmbd, a component of the Linux kernel. This vulnerability occurs when a multichannel Server Message Block (SMB2) session setup request, specifically one with a binding flag, fails. Due to an error in handling this failure, ksmbd incorrectly retains a binding state for the connection. This can lead to all subsequent session lookups falling back to a global sessions table, potentially causing unexpected session management and service disruption." ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-31409\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31409\nhttps://lore.kernel.org/linux-cve-announce/2026040629-CVE-2026-31409-d22c@gregkh/T" ],
  "name" : "CVE-2026-31409",
  "csaw" : false
}