{
  "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-2026-89948",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89948",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-16T10:32:34.089Z",
    "updatedAt": "2026-10-19T08:55:22.451Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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: bla: fix freeing of claims on meshif deletion",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: bla: fix freeing of claims on meshif deletion\n\nWhen the mesh interface is getting deleted, then\nbatadv_bla_del_backbone_claims() (via batadv_bla_purge_backbone_gw()) could\nmake sure that all claims gets removed. But this function is only executed\nwhen bat_priv->bla.claim_hash is not NULL. And since batadv_bla_free() is\nalways setting it to NULL before it is (indirectly) called, it was never\nactually executed.\n\nBut the batadv_bla_purge_claims() -> batadv_handle_unclaim() is at the\nmoment too fragile because the BLA code is not handling the rehashing in\nbatadv_bla_update_orig_address(). The stored backbone address doesn't have\nto be the one actually used for the hash bucket selection during the\ninitial adding of the backbone. The batadv_handle_unclaim() can therefore\nfail to find the respective backbone for the unclaim and then stop the\ndeletion.\n\nBut the actual backbone_gw object is not needed for the unclaim because all\nrelevant information is always provided by the caller. And the check for\nthe existence of the backbone_gw doesn't provide any additional security\ncheck for the deletion of a claim.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "844a95a734f178d56c7acce14c5cce2cecff7e1a"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "baeb1a28fd8e2f68193650d3664a8cd1adfd85c6"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "aacffa780a37e06cd5a13d33740a6e96c3a67e6c"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "76aedcde5a2489cc971d4d1e396e784a49565e96"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f50edb69082a8ba990cc23d642089829f99afe6a"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "871acdf97f64cee8398f72b88b89e8b4f4816dbe"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9a0c47023d3254048a1588534755d4476bcc3abc"
            },
            {
              "version": "23721387c409087fd3b97e274f34d3ddc0970b74",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8d128c932bced74e3b1625ba3d7c78ef122a88a7"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.5"
            },
            {
              "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": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.51",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}