ubuntu-cve-2026-48959
Vulnerability from osv_ubuntu
Published
2026-05-27 04:16
Modified
2026-07-01 11:47
Summary
Details

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 $c shrinks from 16 KiB to 1-19 bytes per iteration. Extracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip->new($zip, Name => $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcgi-fast-perl",
            "binary_version": "5.18.2-2ubuntu1.7+esm7"
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            "binary_version": "5.18.2-2ubuntu1.7+esm7"
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            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          },
          {
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            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          },
          {
            "binary_name": "perl-modules",
            "binary_version": "5.18.2-2ubuntu1.7+esm7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "perl",
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      },
      "ranges": [
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            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
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        "5.18.2-2ubuntu1",
        "5.18.2-2ubuntu1.1",
        "5.18.2-2ubuntu1.3",
        "5.18.2-2ubuntu1.4",
        "5.18.2-2ubuntu1.6",
        "5.18.2-2ubuntu1.7",
        "5.18.2-2ubuntu1.7+esm3",
        "5.18.2-2ubuntu1.7+esm4",
        "5.18.2-2ubuntu1.7+esm5",
        "5.18.2-2ubuntu1.7+esm7"
      ]
    },
    {
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        "5.22.1-9ubuntu0.3",
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    },
    {
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        "5.26.1-6ubuntu0.5",
        "5.26.1-6ubuntu0.6",
        "5.26.1-6ubuntu0.7",
        "5.26.1-6ubuntu0.7+esm2"
      ]
    },
    {
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          {
            "binary_name": "libio-compress-perl",
            "binary_version": "2.074-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libio-compress-perl",
        "purl": "pkg:deb/ubuntu/libio-compress-perl@2.074-1?arch=source\u0026distro=bionic"
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    {
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          {
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            "binary_name": "perl-debug",
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          {
            "binary_name": "perl-modules-5.30",
            "binary_version": "5.30.0-9ubuntu0.5+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.30.0-9ubuntu0.5+esm2?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
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      ],
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    {
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      "package": {
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        "name": "libio-compress-perl",
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          {
            "binary_name": "perl-debug",
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            "binary_name": "perl-modules-5.34",
            "binary_version": "5.34.0-3ubuntu1.7"
          }
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      "package": {
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        "name": "perl",
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      },
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        "5.34.0-3ubuntu1.2",
        "5.34.0-3ubuntu1.3",
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      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libio-compress-perl",
            "binary_version": "2.207-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libio-compress-perl",
        "purl": "pkg:deb/ubuntu/libio-compress-perl@2.207-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
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        "2.207-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libperl5.38t64",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          },
          {
            "binary_name": "perl-modules-5.38",
            "binary_version": "5.38.2-3.2ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.38.2-3.2ubuntu0.3?arch=source\u0026distro=noble"
      },
      "ranges": [
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          "type": "ECOSYSTEM"
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        "5.38.2-3.2build2.1",
        "5.38.2-3.2ubuntu0.1",
        "5.38.2-3.2ubuntu0.2",
        "5.38.2-3.2ubuntu0.3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libio-compress-perl",
            "binary_version": "2.213-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libio-compress-perl",
        "purl": "pkg:deb/ubuntu/libio-compress-perl@2.213-1?arch=source\u0026distro=questing"
      },
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          {
            "binary_name": "perl-base",
            "binary_version": "5.40.1-6ubuntu0.1"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.40.1-6ubuntu0.1"
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libio-compress-perl",
            "binary_version": "2.217-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libio-compress-perl",
        "purl": "pkg:deb/ubuntu/libio-compress-perl@2.217-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
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        "2.214-1",
        "2.217-1"
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libperl5.40",
            "binary_version": "5.40.1-7ubuntu0.1"
          },
          {
            "binary_name": "perl",
            "binary_version": "5.40.1-7ubuntu0.1"
          },
          {
            "binary_name": "perl-base",
            "binary_version": "5.40.1-7ubuntu0.1"
          },
          {
            "binary_name": "perl-debug",
            "binary_version": "5.40.1-7ubuntu0.1"
          },
          {
            "binary_name": "perl-modules-5.40",
            "binary_version": "5.40.1-7ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "perl",
        "purl": "pkg:deb/ubuntu/perl@5.40.1-7ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.40.1-6build1",
        "5.40.1-7build1",
        "5.40.1-7ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "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 $c shrinks from 16 KiB to 1-19 bytes per iteration. Extracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry\u0027s compressed size, up to the non-Zip64 4 GiB cap.",
  "id": "UBUNTU-CVE-2026-48959",
  "modified": "2026-07-01T11:47:43Z",
  "published": "2026-05-27T04:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-48959"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-48959"
    },
    {
      "type": "REPORT",
      "url": "https://lists.security.metacpan.org/cve-announce/msg/40434381/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/pmqs/IO-Compress/commit/68db44076f4c1a86a2ffe53a958eac6cabaf72e2.patch"
    },
    {
      "type": "REPORT",
      "url": "https://metacpan.org/release/PMQS/IO-Compress-2.220/changes"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/27/2"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-48959"
  ]
}



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