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  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72450.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: validate selector family and prefixlen during match\n\nsyzbot reported a shift-out-of-bounds in xfrm_selector_match()\ndue to AF_UNSPEC selector with large prefixlen (e.g. 128) matched\nagainst IPv4 flow (when XFRM_STATE_AF_UNSPEC is set).\n\nFix this by:\n\n- Rejecting mismatched families in xfrm_selector_match.\n- Returning false in addr4_match if prefixlen \u003e 32.\n- Returning false in addr_match if prefixlen \u003e 128 (prevents overflow).",
  "id": "CVE-2026-72450",
  "modified": "2026-08-18T03:30:53.697308004Z",
  "published": "2026-08-15T05:56:58.939Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40f0b1047918539f0b0f795ac65e35336b4c2c78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a03a2ee17e8259dde631ed84fd8322db06cb2ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78783fefdc8f36879b1a17efa0d3195ea5f2dc5f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87a5bbccc7ff4edb3f42fea387124237d2ba91ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3968ad4195d72c8fddcc6c0ef39da95ac98711a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd7f202cf77556cff59f68dc30e4cdf40cb6e33b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/efa9e3b9f3dea2e1ea4c7edf4edc863faef85986"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72450.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72450"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "xfrm: validate selector family and prefixlen during match"
}