{
  "threat_severity" : "Moderate",
  "public_date" : "2026-04-25T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: af_unix: read UNIX_DIAG_VFS data under unix_state_lock",
    "id" : "2461752",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2461752"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "draft"
  },
  "cwe" : "CWE-413",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\naf_unix: read UNIX_DIAG_VFS data under unix_state_lock\nExact UNIX diag lookups hold a reference to the socket, but not to\nu->path. Meanwhile, unix_release_sock() clears u->path under\nunix_state_lock() and drops the path reference after unlocking.\nRead the inode and device numbers for UNIX_DIAG_VFS while holding\nunix_state_lock(), then emit the netlink attribute after dropping the\nlock.\nThis keeps the VFS data stable while the reply is being built.", "A flaw was found in the Linux kernel. A race condition in the `af_unix` component allows a local attacker to cause unstable Virtual File System (VFS) data when `UNIX_DIAG_VFS` data is handled. This occurs because inode and device numbers are read without consistently holding the `unix_state_lock()`, while `u->path` can be cleared. This instability could lead to information disclosure or a denial of service." ],
  "statement" : "`UNIX_DIAG_VFS` dumps now run under `unix_state_lock`, closing races with concurrent unlink/bind. Red Hat treats this as a local diagnostics race in AF_UNIX.",
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Fix deferred",
    "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" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-31673\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31673\nhttps://lore.kernel.org/linux-cve-announce/2026042539-CVE-2026-31673-b5f6@gregkh/T" ],
  "name" : "CVE-2026-31673",
  "csaw" : false
}