{
  "cveId": "CVE-2026-45966",
  "url": "https://patchblox.com/security/cve/CVE-2026-45966",
  "summary": "CVE-2026-45966 is fixed in linux on 1 platform by DEBIAN-CVE-2026-45966 (version 6.18.14-1), released May 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  apparmor: fix NULL pointer dereference in __unix...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  apparmor: fix NULL pointer dereference in __unix_needs_revalidation  When receiving file descriptors via SCM_RIGHTS, both the socket pointer and the socket\u0027s sk pointer can be NULL during socket setup or teardown, causing NULL pointer dereferences in __unix_needs_revalidation().  This is a regression in AppArmor 5.0.0 (kernel 6.17\u002B) where the new __unix_needs_revalidation() function was added without proper NULL checks.  The crash manifests as:   BUG: kernel NULL pointer dereference, address: 0x0000000000000018   RIP: aa_file_perm\u002B0xb7/0x3b0 (or \u002B0xbe/0x3b0, \u002B0xc0/0x3e0)   Call Trace:    apparmor_file_receive\u002B0x42/0x80    security_file_receive\u002B0x2e/0x50    receive_fd\u002B0x1d/0xf0    scm_detach_fds\u002B0xad/0x1c0  The function dereferences sock-\u003Esk-\u003Esk_family without checking if either sock or sock-\u003Esk is NULL first.  Add NULL checks for both sock and sock-\u003Esk before accessing sk_family.",
  "published": "2026-05-27T14:17:13Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00121,
  "epssPercentile": 0.01903,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.18.14-1",
      "fix": "DEBIAN-CVE-2026-45966",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-45966",
      "released": "2026-05-27T17:38:13Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}