{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "88fec3526e84123997ecebd6bb6778eb4ce779b7"
            },
            {
              "fixed": "fea017a7f6abe179decf575a2d8464c74edb3964"
            },
            {
              "fixed": "e85bc9101afc4202aa2269967ce9d3ffbecd0994"
            },
            {
              "fixed": "e2938ad00b21340c0362562dfedd7cfec0554d67"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.17.0"
            },
            {
              "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-2026-45966.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix NULL pointer dereference in __unix_needs_revalidation\n\nWhen receiving file descriptors via SCM_RIGHTS, both the socket pointer\nand the socket's sk pointer can be NULL during socket setup or teardown,\ncausing NULL pointer dereferences in __unix_needs_revalidation().\n\nThis is a regression in AppArmor 5.0.0 (kernel 6.17+) where the new\n__unix_needs_revalidation() function was added without proper NULL checks.\n\nThe crash manifests as:\n  BUG: kernel NULL pointer dereference, address: 0x0000000000000018\n  RIP: aa_file_perm+0xb7/0x3b0 (or +0xbe/0x3b0, +0xc0/0x3e0)\n  Call Trace:\n   apparmor_file_receive+0x42/0x80\n   security_file_receive+0x2e/0x50\n   receive_fd+0x1d/0xf0\n   scm_detach_fds+0xad/0x1c0\n\nThe function dereferences sock-\u003esk-\u003esk_family without checking if either\nsock or sock-\u003esk is NULL first.\n\nAdd NULL checks for both sock and sock-\u003esk before accessing sk_family.",
  "id": "CVE-2026-45966",
  "modified": "2026-07-08T05:37:01.903379376Z",
  "published": "2026-05-27T12:18:24.300Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2938ad00b21340c0362562dfedd7cfec0554d67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e85bc9101afc4202aa2269967ce9d3ffbecd0994"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fea017a7f6abe179decf575a2d8464c74edb3964"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45966.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45966"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "apparmor: fix NULL pointer dereference in __unix_needs_revalidation"
}