{
  "cveId": "CVE-2026-42497",
  "url": "https://patchblox.com/security/cve/CVE-2026-42497",
  "summary": "CVE-2026-42497 is fixed in 7 products on 1 platform, first by libperl5.38t64 5.38.2-3.2ubuntu0.3, released May 25, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the extraction directory",
  "description": "Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the extraction directory.  _make_special_file() passes the tar header\u0027s linkname to link() without validating it against absolute paths or .. segments, creating a hardlink that shares the victim file\u0027s inode.  A subsequent write through the extracted name modifies the victim file, and the post-extraction chmod, chown, and utime block in _extract_file() (guarded only against symlinks via -l) applies the tar header\u0027s mode, owner, and timestamps to the shared inode during extraction alone.",
  "published": "2026-05-25T19:16:00Z",
  "severity": "Moderate",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
  "cwe": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
  "epss": 0.00458,
  "epssPercentile": 0.39928,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42497",
  "fixes": [
    {
      "platform": "linux",
      "product": "libperl5.38t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.3",
      "fix": "libperl5.38t64 5.38.2-3.2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libperl5.38t64-5.38.2-3.2ubuntu0.3",
      "released": "2026-05-25T19:16:00Z"
    },
    {
      "platform": "linux",
      "product": "perl",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.36.0-7\u002Bdeb12u4",
      "fix": "DEBIAN-CVE-2026-42497",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-42497",
      "released": "2026-05-26T02:16:40Z"
    },
    {
      "platform": "linux",
      "product": "perl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.40.1-6\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-42497",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-42497",
      "released": "2026-05-26T02:16:40Z"
    },
    {
      "platform": "linux",
      "product": "perl",
      "release": "Debian 14",
      "fixedVersion": "5.42.3-1",
      "fix": "DEBIAN-CVE-2026-42497",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-42497",
      "released": "2026-05-26T02:16:40Z"
    },
    {
      "platform": "linux",
      "product": "perl",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.3",
      "fix": "perl 5.38.2-3.2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-perl-5.38.2-3.2ubuntu0.3",
      "released": "2026-05-25T19:16:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-Archive-Tar",
      "release": "amzn 2023",
      "fixedVersion": "3.04-522.amzn2023.0.3",
      "fix": "ALAS2023-2026-1805",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1805",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-Archive-Tar-tests",
      "release": "amzn 2023",
      "fixedVersion": "3.04-522.amzn2023.0.3",
      "fix": "ALAS2023-2026-1805",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1805",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-base",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.3",
      "fix": "perl-base 5.38.2-3.2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-perl-base-5.38.2-3.2ubuntu0.3",
      "released": "2026-05-25T19:16:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-debug",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.3",
      "fix": "perl-debug 5.38.2-3.2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-perl-debug-5.38.2-3.2ubuntu0.3",
      "released": "2026-05-25T19:16:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-modules-5.38",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.3",
      "fix": "perl-modules-5.38 5.38.2-3.2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-perl-modules-5.38-5.38.2-3.2ubuntu0.3",
      "released": "2026-05-25T19:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}