{
  "cveId": "CVE-2026-48959",
  "url": "https://patchblox.com/security/cve/CVE-2026-48959",
  "summary": "CVE-2026-48959 is fixed in 12 products on 1 platform, first by ALAS2023-2026-1825, released June 11, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libperl5.38t64: IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward",
  "description": "IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward. fastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration. Extracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u0026gt;new($zip, Name =\u0026gt; $target) drives a per-byte read loop scaling with the entry\u0027s compressed size, up to the non-Zip64 4 GiB cap.",
  "published": "2026-05-26T21:16:00Z",
  "severity": "Medium",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00553,
  "epssPercentile": 0.46446,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libio-compress-perl",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.204-1\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2026-48959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48959",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "libio-compress-perl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.213-1\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-48959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48959",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "libio-compress-perl",
      "release": "Debian 14",
      "fixedVersion": "2.220-1",
      "fix": "DEBIAN-CVE-2026-48959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48959",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "libperl5.38t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.4",
      "fix": "libperl5.38t64 5.38.2-3.2ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libperl5.38t64-5.38.2-3.2ubuntu0.4",
      "released": "2026-07-13T10:17:00Z"
    },
    {
      "platform": "linux",
      "product": "perl",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.36.0-7\u002Bdeb12u4",
      "fix": "DEBIAN-CVE-2026-48959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48959",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "perl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.40.1-6\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-48959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48959",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "perl",
      "release": "Debian 14",
      "fixedVersion": "5.40.1-8",
      "fix": "DEBIAN-CVE-2026-48959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48959",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "perl",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.4",
      "fix": "perl 5.38.2-3.2ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-perl-5.38.2-3.2ubuntu0.4",
      "released": "2026-07-13T10:17:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-Compress-Raw-Bzip2",
      "release": "Fedora 43",
      "fixedVersion": "2.218-1.fc43",
      "fix": "FEDORA-2026-FB1F15CE04",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-fb1f15ce04",
      "released": "2026-06-22T15:01:47Z"
    },
    {
      "platform": "linux",
      "product": "perl-Compress-Raw-Bzip2-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "2.218-1.fc43",
      "fix": "FEDORA-2026-FB1F15CE04",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-fb1f15ce04",
      "released": "2026-06-22T15:01:47Z"
    },
    {
      "platform": "linux",
      "product": "perl-Compress-Raw-Bzip2-debugsource",
      "release": "Fedora 43",
      "fixedVersion": "2.218-1.fc43",
      "fix": "FEDORA-2026-FB1F15CE04",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-fb1f15ce04",
      "released": "2026-06-22T15:01:47Z"
    },
    {
      "platform": "linux",
      "product": "perl-Compress-Raw-Bzip2-tests",
      "release": "Fedora 43",
      "fixedVersion": "2.218-1.fc43",
      "fix": "FEDORA-2026-FB1F15CE04",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-fb1f15ce04",
      "released": "2026-06-22T15:01:47Z"
    },
    {
      "platform": "linux",
      "product": "perl-IO-Compress",
      "release": "Fedora 43",
      "fixedVersion": "2.221-1.fc43",
      "fix": "FEDORA-2026-FB1F15CE04",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-fb1f15ce04",
      "released": "2026-06-22T15:01:47Z"
    },
    {
      "platform": "linux",
      "product": "perl-IO-Compress",
      "release": "amzn 2023",
      "fixedVersion": "2.217-1.amzn2023.0.2",
      "fix": "ALAS2023-2026-1825",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1825",
      "released": "2026-06-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-IO-Compress-tests",
      "release": "Fedora 43",
      "fixedVersion": "2.221-1.fc43",
      "fix": "FEDORA-2026-FB1F15CE04",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-fb1f15ce04",
      "released": "2026-06-22T15:01:47Z"
    },
    {
      "platform": "linux",
      "product": "perl-IO-Compress-tests",
      "release": "amzn 2023",
      "fixedVersion": "2.217-1.amzn2023.0.2",
      "fix": "ALAS2023-2026-1825",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1825",
      "released": "2026-06-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-base",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.4",
      "fix": "perl-base 5.38.2-3.2ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-perl-base-5.38.2-3.2ubuntu0.4",
      "released": "2026-07-13T10:17:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-debug",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.4",
      "fix": "perl-debug 5.38.2-3.2ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-perl-debug-5.38.2-3.2ubuntu0.4",
      "released": "2026-07-13T10:17:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-modules-5.38",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "5.38.2-3.2ubuntu0.4",
      "fix": "perl-modules-5.38 5.38.2-3.2ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-perl-modules-5.38-5.38.2-3.2ubuntu0.4",
      "released": "2026-07-13T10:17:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}