{
  "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-2026-31696",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31696",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-01T13:55:57.485Z",
    "updatedAt": "2026-10-15T01:17:54.785Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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": "rxrpc: Fix missing validation of ticket length in non-XDR key preparsing",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix missing validation of ticket length in non-XDR key preparsing\n\nIn rxrpc_preparse(), there are two paths for parsing key payloads: the\nXDR path (for large payloads) and the non-XDR path (for payloads <= 28\nbytes). While the XDR path (rxrpc_preparse_xdr_rxkad()) correctly\nvalidates the ticket length against AFSTOKEN_RK_TIX_MAX, the non-XDR\npath fails to do so.\n\nThis allows an unprivileged user to provide a very large ticket length.\nWhen this key is later read via rxrpc_read(), the total\ntoken size (toksize) calculation results in a value that exceeds\nAFSTOKEN_LENGTH_MAX, triggering a WARN_ON().\n\n[ 2001.302904] WARNING: CPU: 2 PID: 2108 at net/rxrpc/key.c:778 rxrpc_read+0x109/0x5c0 [rxrpc]\n\nFix this by adding a check in the non-XDR parsing path of rxrpc_preparse()\nto ensure the ticket length does not exceed AFSTOKEN_RK_TIX_MAX,\nbringing it into parity with the XDR parsing logic.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
              "status": "affected",
              "versionType": "git",
              "lessThan": "44714dfda386884919ba366411880b6fb3c3efd3"
            },
            {
              "version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
              "status": "affected",
              "versionType": "git",
              "lessThan": "41a117dd80371343babc52198d1114e83eb37627"
            },
            {
              "version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9a397aa9b5e53ca63d4d6aefb542832eca389618"
            },
            {
              "version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1fa36cf495b0023e8475d038535c05e4063211e1"
            },
            {
              "version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4458757c020592a3094366e0fb20457383b42f92"
            },
            {
              "version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ce383ba615339f8eaec646a166d2c2b015bb5ca0"
            },
            {
              "version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a1be1c9ece26cea69654f28b255ff9a7906b897b"
            },
            {
              "version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ac33733b10b484d666f97688561670afd5861383"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.17",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.17"
            },
            {
              "version": "5.10.258",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.136",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.84",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.25",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.2",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}