{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-53181",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53181",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-25T08:38:55.994Z",
    "updatedAt": "2026-10-15T01:22:34.587Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "vsock/vmci: fix sk_ack_backlog leak on failed handshake",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/vmci: fix sk_ack_backlog leak on failed handshake\n\nWhen vmci_transport_recv_connecting_server() returns an error,\nvmci_transport_recv_listen() calls vsock_remove_pending() but never\ncalls sk_acceptq_removed(). This leaves sk_ack_backlog incremented\npermanently.\n\nRepeated handshake failures (malformed packets, queue pair alloc\nfailure, event subscribe failure) cause sk_ack_backlog to climb\ntoward sk_max_ack_backlog. Once it reaches the limit the listener\npermanently refuses all new connections with -ECONNREFUSED, a\nsilent denial of service requiring a process restart to recover.\n\nThe two existing sk_acceptq_removed() calls in af_vsock.c do not\ncover this path: line 764 checks vsock_is_pending() which returns\nfalse after vsock_remove_pending(), and line 1889 is only reached\non successful accept().\n\nFix by balancing sk_acceptq_added() with sk_acceptq_removed() on\nthe error path.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "status": "affected",
              "versionType": "git",
              "lessThan": "22c587aa3ab1ab5264daff3ec32136fd30436c13"
            },
            {
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cf7090e255d74c4b61c51f8ede9fcacdd8393b5b"
            },
            {
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ea0b03d52881c12a8c634ea0d6cbfa61cefdb488"
            },
            {
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dfd853197615d322d3a88dbcab91fc0fd2096219"
            },
            {
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bcb275626055df7f8f947f1a349754b4004d9a15"
            },
            {
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ba9ad6015937a5e46ba1a31370e3efdec8abbdcc"
            },
            {
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9698582a4dd9c4a05889d7db96d4c0edc9e69cac"
            },
            {
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c05fa14db43ebef3bd862ca9d073981c0358b3f0"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.9"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.94",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.36",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}