{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "349271568303695f0ac3563af153d2b4542f6986"
            },
            {
              "fixed": "5835a077c6f5c565d525eaca9fac01572b97a9b9"
            },
            {
              "fixed": "eb8166c79097996396468a341de258a798789d36"
            },
            {
              "fixed": "ea1535e28bb3773fc0b3cbd1f3842b808016990c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.18.0"
            },
            {
              "fixed": "6.18.14"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45971.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Limit bpf program signature size\n\nPractical BPF signatures are significantly smaller than\nKMALLOC_MAX_CACHE_SIZE\n\nAllowing larger sizes opens the door for abuse by passing excessive\nsize values and forcing the kernel into expensive allocation paths (via\nkmalloc_large or vmalloc).",
  "id": "CVE-2026-45971",
  "modified": "2026-07-08T05:37:07.520867021Z",
  "published": "2026-05-27T12:18:30.651Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5835a077c6f5c565d525eaca9fac01572b97a9b9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea1535e28bb3773fc0b3cbd1f3842b808016990c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb8166c79097996396468a341de258a798789d36"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45971.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45971"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "bpf: Limit bpf program signature size"
}