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af_unix: read UNIX_DIAG_VFS data under unix_state_lock

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: af_unix: read UNIX_DIAG_VFS data under unix_state_lock Exact UNIX diag lookups hold a reference to the socket, but not to u->path. Meanwhile, unix_release_sock() clears u->path under unix_state_lock() and drops the path reference after unlocking. Read the inode and device numbers for UNIX_DIAG_VFS while holding unix_state_lock(), then emit the netlink attribute after dropping the lock. This keeps the VFS data stable while the reply is being built.

Announced Source revision 1
Original source ↗

CVE-2026-31673

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-31673

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5f7b0569460b7d8d01ca776430a00505a68b7584",
        "lessThan": "e7339db13b9ddb63417b12da55fd6191e59f7442",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5f7b0569460b7d8d01ca776430a00505a68b7584",
        "lessThan": "4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5f7b0569460b7d8d01ca776430a00505a68b7584",
        "lessThan": "c3ec44ab4526bbc4b6c9fc845af86488244f4c9b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5f7b0569460b7d8d01ca776430a00505a68b7584",
        "lessThan": "b9232421a77a649c9376c99fdfc8cb7f79cad34c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5f7b0569460b7d8d01ca776430a00505a68b7584",
        "lessThan": "0c739f3785f84af695952c2bac8be2f45082c9b8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5f7b0569460b7d8d01ca776430a00505a68b7584",
        "lessThan": "900a4e0910e98b8caef117d5df00471fa438dcf9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5f7b0569460b7d8d01ca776430a00505a68b7584",
        "lessThan": "bdf206e740bf2919d818f132c8c9cc7ed91d11c0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5f7b0569460b7d8d01ca776430a00505a68b7584",
        "lessThan": "39897df386376912d561d4946499379effa1e7ef",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/unix/diag.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.3",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.136",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.83",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.24",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.14",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/unix/diag.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-31673

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#39946 · Revision 1
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Publisher date
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