{
  "cveId": "CVE-2026-66484",
  "url": "https://patchblox.com/security/cve/CVE-2026-66484",
  "summary": "CVE-2026-66484 is fixed in 2 products on 1 platform, first by cpio 2.15\u002Bdfsg-2.1ubuntu0.1, released August 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Path Traversal in GNU cpio",
  "description": "GNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. When extracting a tar archive in copy-in mode with the --no-absolute-filenames option, the extracted file name is normalized but the tar hard-link target is passed to the link_to_name function without equivalent sanitization before calling link function. A tar archive provided by an attacker, containing a hard-link entry whose linkname is set to an absolute path outside the extraction directory, can cause cpio to create a hard link to an existing file outside the intended extraction directory, breaking the expected guarantee of --no-absolute-filenames and allowing archive-controlled linkage to external files. This issue has been fixed in commit e2b9cbdd3354d2b1569b7390d1bc15c1930559ad",
  "published": "2026-08-10T04:17:00Z",
  "severity": "Moderate",
  "cwe": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
  "epss": 0.00197,
  "epssPercentile": 0.09434,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66484",
  "fixes": [
    {
      "platform": "linux",
      "product": "cpio",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.12\u002Bdfsg-6ubuntu0.18.04.4\u002Besm1",
      "fix": "cpio 2.12\u002Bdfsg-6ubuntu0.18.04.4\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cpio-2.12-dfsg-6ubuntu0.18.04.4-esm1",
      "released": "2026-09-03T01:35:39Z"
    },
    {
      "platform": "linux",
      "product": "cpio",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.13\u002Bdfsg-2ubuntu0.4\u002Besm1",
      "fix": "cpio 2.13\u002Bdfsg-2ubuntu0.4\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cpio-2.13-dfsg-2ubuntu0.4-esm1",
      "released": "2026-09-03T01:35:42Z"
    },
    {
      "platform": "linux",
      "product": "cpio",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.13\u002Bdfsg-7ubuntu0.2",
      "fix": "cpio 2.13\u002Bdfsg-7ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-cpio-2.13-dfsg-7ubuntu0.2",
      "released": "2026-09-03T01:35:47Z"
    },
    {
      "platform": "linux",
      "product": "cpio",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.15\u002Bdfsg-1ubuntu2.1",
      "fix": "cpio 2.15\u002Bdfsg-1ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-cpio-2.15-dfsg-1ubuntu2.1",
      "released": "2026-09-03T01:35:47Z"
    },
    {
      "platform": "linux",
      "product": "cpio",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.15\u002Bdfsg-2.1ubuntu0.1",
      "fix": "cpio 2.15\u002Bdfsg-2.1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-cpio-2.15-dfsg-2.1ubuntu0.1",
      "released": "2026-08-10T04:17:00Z"
    },
    {
      "platform": "linux",
      "product": "cpio",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.15-160000.3.1",
      "fix": "OPENSUSE-SU-2026:21747-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21747-1",
      "released": "2026-09-03T14:47:52Z"
    },
    {
      "platform": "linux",
      "product": "cpio",
      "release": "sles 15.7",
      "fixedVersion": "2.13-150400.3.10.1",
      "fix": "SUSE-SU-2026:4012-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4012-1",
      "released": "2026-09-07T07:34:54Z"
    },
    {
      "platform": "linux",
      "product": "cpio",
      "release": "sles 16.0",
      "fixedVersion": "2.15-160000.3.1",
      "fix": "SUSE-SU-2026:23612-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23612-1",
      "released": "2026-09-03T14:49:10Z"
    },
    {
      "platform": "linux",
      "product": "cpio-win32",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.12\u002Bdfsg-6ubuntu0.18.04.4\u002Besm1",
      "fix": "cpio-win32 2.12\u002Bdfsg-6ubuntu0.18.04.4\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cpio-win32-2.12-dfsg-6ubuntu0.18.04.4-esm1",
      "released": "2026-09-03T01:35:39Z"
    },
    {
      "platform": "linux",
      "product": "cpio-win32",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.13\u002Bdfsg-2ubuntu0.4\u002Besm1",
      "fix": "cpio-win32 2.13\u002Bdfsg-2ubuntu0.4\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cpio-win32-2.13-dfsg-2ubuntu0.4-esm1",
      "released": "2026-09-03T01:35:42Z"
    },
    {
      "platform": "linux",
      "product": "cpio-win32",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.13\u002Bdfsg-7ubuntu0.2",
      "fix": "cpio-win32 2.13\u002Bdfsg-7ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-cpio-win32-2.13-dfsg-7ubuntu0.2",
      "released": "2026-09-03T01:35:47Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T19:38:12Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}