{
  "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-2026-31420",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31420",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-13T13:40:24.594Z",
    "updatedAt": "2026-09-14T11:58:16.075Z",
    "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": "bridge: mrp: reject zero test interval to avoid OOM panic",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbridge: mrp: reject zero test interval to avoid OOM panic\n\nbr_mrp_start_test() and br_mrp_start_in_test() accept the user-supplied\ninterval value from netlink without validation. When interval is 0,\nusecs_to_jiffies(0) yields 0, causing the delayed work\n(br_mrp_test_work_expired / br_mrp_in_test_work_expired) to reschedule\nitself with zero delay. This creates a tight loop on system_percpu_wq\nthat allocates and transmits MRP test frames at maximum rate, exhausting\nall system memory and causing a kernel panic via OOM deadlock.\n\nThe same zero-interval issue applies to br_mrp_start_in_test_parse()\nfor interconnect test frames.\n\nUse NLA_POLICY_MIN(NLA_U32, 1) in the nla_policy tables for both\nIFLA_BRIDGE_MRP_START_TEST_INTERVAL and\nIFLA_BRIDGE_MRP_START_IN_TEST_INTERVAL, so zero is rejected at the\nnetlink attribute parsing layer before the value ever reaches the\nworkqueue scheduling code. This is consistent with how other bridge\nsubsystems (br_fdb, br_mst) enforce range constraints on netlink\nattributes.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "610073ffb77ffd2b5eca182d2ac264de4834a175"
            },
            {
              "version": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ec8850be9b2b3beac1c7967d95f169dd2785979d"
            },
            {
              "version": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1ec86b4b9e28170a2565cf36f0e6e2b96b55134d"
            },
            {
              "version": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2120bd8546cd6a63c558d135773aa8f41c8259fc"
            },
            {
              "version": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "630a15a31c2034b5b697f4aabc769b9d80d82446"
            },
            {
              "version": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e8ec80430bfa520e7352155d6ac632e527cba7aa"
            },
            {
              "version": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c9bc352f716d1bebfe43354bce539ec2d0223b30"
            },
            {
              "version": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fa6e24963342de4370e3a3c9af41e38277b74cf3"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.8"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.92",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.34",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}