{
  "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-2026-31657",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31657",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-24T14:45:08.867Z",
    "updatedAt": "2026-10-19T18:56:01.882Z",
    "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": "batman-adv: hold claim backbone gateways by reference",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: hold claim backbone gateways by reference\n\nbatadv_bla_add_claim() can replace claim->backbone_gw and drop the old\ngateway's last reference while readers still follow the pointer.\n\nThe netlink claim dump path dereferences claim->backbone_gw->orig and\ntakes claim->backbone_gw->crc_lock without pinning the underlying\nbackbone gateway. batadv_bla_check_claim() still has the same naked\npointer access pattern.\n\nReuse batadv_bla_claim_get_backbone_gw() in both readers so they operate\non a stable gateway reference until the read-side work is complete.\nThis keeps the dump and claim-check paths aligned with the lifetime\nrules introduced for the other BLA claim readers.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5202f071b367ffbc8e279fc7a00db14f5e587f52"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "69d1ce9c72eca91203ffdb8d08bacd511100aec6"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f4858832ddef2f39f21e30b7226bbcd3c4b2bc96"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2f55b58b5a0bbed192d60c444a45a49cdf1b545f"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7962b522222628596ca9ecc8722efc95367aadbd"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4dee4c0688443aaf5bbec74aa203c851d1d53c35"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1f2dc36c297d27733f1b380ea644cf15a361bd7b"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "82d8701b2c930d0e96b0dbc9115a218d791cb0d2"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.5"
            },
            {
              "version": "5.10.258",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.169",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.135",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.82",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.23",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}