{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d2102f2f5d75a84dbab6ff890359f0bd4a18ca22"
            },
            {
              "fixed": "0b92ad64d6e4bde85e6b9888404f9a7a2b65d269"
            },
            {
              "fixed": "d57db0d975053e01410c54e708a85b6d32ef2ebd"
            },
            {
              "fixed": "53040a81ae57cdca8af8ac36fe4e661730cf7c6b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.14.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64353.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Keep dynamic inner array lookups nullable\n\nAn ARRAY_OF_MAPS can use an array created with BPF_F_INNER_MAP as its\ninner map template. A concrete inner array with a different max_entries\nvalue can then replace the template.\n\nAfter a successful outer map lookup, the verifier represents the\nresulting map pointer using the inner map template. Const-key lookup\nnullness elision consequently uses the template max_entries even though\nthe runtime helper uses the concrete inner map max_entries.\n\nDo not elide lookup result nullness for maps marked with BPF_F_INNER_MAP,\nbecause the template max_entries does not prove that the key is in bounds\nfor the concrete runtime map.",
  "id": "CVE-2026-64353",
  "modified": "2026-07-27T03:56:20.457271810Z",
  "published": "2026-07-25T08:50:12.120Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b92ad64d6e4bde85e6b9888404f9a7a2b65d269"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/53040a81ae57cdca8af8ac36fe4e661730cf7c6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d57db0d975053e01410c54e708a85b6d32ef2ebd"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64353.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64353"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "bpf: Keep dynamic inner array lookups nullable"
}