UnratedFix available

UBUNTU-CVE-2026-73193

Type: advisorySource: OSV1 source record

DBI versions before 1.652 for Perl allow a heap out-of-bounds write on 32-bit perl via an integer wraparound in the output buffer size computed by preparse. preparse reserves its output buffer with `newSV(strlen(statement) * 7 + 16)`, budgeting seven output bytes per input byte for the longest ':p99999' expansion. The product is computed in STRLEN, which is 32 bits wide on a 32-bit perl build, so a statement of 613,566,757 bytes multiplies to 4,294,967,299, wraps modulo 2^32 to 3, and reserves 19 bytes. The parser then copies the statement out through a raw pointer with no capacity check, writing the whole 585 MB input past the end of the allocation. The 99,999 placeholder limit does not bound this path, which is reached by ordinary non-placeholder content. Any caller that passes an untrusted statement of that length to preparse on a 32-bit perl gets a heap out-of-bounds write of attacker controlled bytes. Builds with a 64-bit STRLEN are not affected, since the wrap there needs a statement of about 2.3 exabytes.

Announced 15 Aug 2026Group revision 1

Original source ↗

UBUNTU-CVE-2026-73193

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-73193

libdbi-perl

Source reference: /affected/0/package/name

Affected versions: 1.627-1
Source reference: /affected/0/versions
1.628-1
Source reference: /affected/0/versions
1.630-1
Source reference: /affected/0/versions
1.630-1ubuntu0.1~esm1
Source reference: /affected/0/versions
1.630-1ubuntu0.1~esm4
Source reference: /affected/0/versions
1.630-1ubuntu0.1~esm5
Source reference: /affected/0/versions
1.630-1ubuntu0.1~esm6
Source reference: /affected/0/versions
Fixed versions: 1.630-1ubuntu0.1~esm8
Source reference: /affected/0/ranges
Prerequisites: Not stated in this record

libdbi-perl

Source reference: /affected/1/package/name

Affected versions: 1.633-1
Source reference: /affected/1/versions
1.634-1
Source reference: /affected/1/versions
1.634-1build1
Source reference: /affected/1/versions
1.634-1ubuntu0.1
Source reference: /affected/1/versions
1.634-1ubuntu0.2
Source reference: /affected/1/versions
1.634-1ubuntu0.2+esm1
Source reference: /affected/1/versions
1.634-1ubuntu0.2+esm2
Source reference: /affected/1/versions
Fixed versions: 1.634-1ubuntu0.2+esm4
Source reference: /affected/1/ranges
Prerequisites: Not stated in this record

libdbi-perl

Source reference: /affected/2/package/name

Affected versions: 1.637-1
Source reference: /affected/2/versions
1.639-1
Source reference: /affected/2/versions
1.640-1
Source reference: /affected/2/versions
1.640-1ubuntu0.1
Source reference: /affected/2/versions
1.640-1ubuntu0.2
Source reference: /affected/2/versions
1.640-1ubuntu0.3
Source reference: /affected/2/versions
1.640-1ubuntu0.3+esm1
Source reference: /affected/2/versions
Fixed versions: 1.640-1ubuntu0.3+esm3
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

libdbi-perl

Source reference: /affected/3/package/name

Affected versions: 1.642-1
Source reference: /affected/3/versions
1.642-1build1
Source reference: /affected/3/versions
1.643-1
Source reference: /affected/3/versions
1.643-1ubuntu0.1
Source reference: /affected/3/versions
1.643-1ubuntu0.1+esm1
Source reference: /affected/3/versions
Fixed versions: 1.643-1ubuntu0.1+esm3
Source reference: /affected/3/ranges
Prerequisites: Not stated in this record

libdbi-perl

Source reference: /affected/4/package/name

Affected versions: 1.643-3build2
Source reference: /affected/4/versions
1.643-3build3
Source reference: /affected/4/versions
1.643-3ubuntu0.1
Source reference: /affected/4/versions
Fixed versions: 1.643-3ubuntu0.3
Source reference: /affected/4/ranges
Prerequisites: Not stated in this record

libdbi-perl

Source reference: /affected/5/package/name

Affected versions: 1.643-4
Source reference: /affected/5/versions
1.643-4build1
Source reference: /affected/5/versions
1.643-4build2
Source reference: /affected/5/versions
1.643-4build3
Source reference: /affected/5/versions
1.643-4ubuntu0.1
Source reference: /affected/5/versions
Fixed versions: 1.643-4ubuntu0.3
Source reference: /affected/5/ranges
Prerequisites: Not stated in this record

libdbi-perl

Source reference: /affected/6/package/name

Affected versions: 1.647-1
Source reference: /affected/6/versions
1.647-1build1
Source reference: /affected/6/versions
1.647-1ubuntu0.26.04.1
Source reference: /affected/6/versions
Fixed versions: 1.647-1ubuntu0.26.04.3
Source reference: /affected/6/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.630-1ubuntu0.1~esm8"
          }
        ]
      }
    ],
    "package": {
      "name": "libdbi-perl",
      "purl": "pkg:deb/ubuntu/libdbi-perl?arch=source&distro=esm-infra-legacy%2Ftrusty",
      "ecosystem": "Ubuntu:Pro:14.04:LTS"
    },
    "versions": [
      "1.627-1",
      "1.628-1",
      "1.630-1",
      "1.630-1ubuntu0.1~esm1",
      "1.630-1ubuntu0.1~esm4",
      "1.630-1ubuntu0.1~esm5",
      "1.630-1ubuntu0.1~esm6"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73193.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libdbi-perl",
          "binary_version": "1.630-1ubuntu0.1~esm8"
        }
      ],
      "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.634-1ubuntu0.2+esm4"
          }
        ]
      }
    ],
    "package": {
      "name": "libdbi-perl",
      "purl": "pkg:deb/ubuntu/libdbi-perl?arch=source&distro=esm-infra-legacy%2Fxenial",
      "ecosystem": "Ubuntu:Pro:16.04:LTS"
    },
    "versions": [
      "1.633-1",
      "1.634-1",
      "1.634-1build1",
      "1.634-1ubuntu0.1",
      "1.634-1ubuntu0.2",
      "1.634-1ubuntu0.2+esm1",
      "1.634-1ubuntu0.2+esm2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73193.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libdbi-perl",
          "binary_version": "1.634-1ubuntu0.2+esm4"
        }
      ],
      "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.640-1ubuntu0.3+esm3"
          }
        ]
      }
    ],
    "package": {
      "name": "libdbi-perl",
      "purl": "pkg:deb/ubuntu/libdbi-perl?arch=source&distro=esm-infra%2Fbionic",
      "ecosystem": "Ubuntu:Pro:18.04:LTS"
    },
    "versions": [
      "1.637-1",
      "1.639-1",
      "1.640-1",
      "1.640-1ubuntu0.1",
      "1.640-1ubuntu0.2",
      "1.640-1ubuntu0.3",
      "1.640-1ubuntu0.3+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73193.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libdbi-perl",
          "binary_version": "1.640-1ubuntu0.3+esm3"
        }
      ],
      "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.643-1ubuntu0.1+esm3"
          }
        ]
      }
    ],
    "package": {
      "name": "libdbi-perl",
      "purl": "pkg:deb/ubuntu/libdbi-perl?arch=source&distro=esm-infra%2Ffocal",
      "ecosystem": "Ubuntu:Pro:20.04:LTS"
    },
    "versions": [
      "1.642-1",
      "1.642-1build1",
      "1.643-1",
      "1.643-1ubuntu0.1",
      "1.643-1ubuntu0.1+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73193.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libdbi-perl",
          "binary_version": "1.643-1ubuntu0.1+esm3"
        }
      ],
      "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.643-3ubuntu0.3"
          }
        ]
      }
    ],
    "package": {
      "name": "libdbi-perl",
      "purl": "pkg:deb/ubuntu/libdbi-perl?arch=source&distro=jammy",
      "ecosystem": "Ubuntu:22.04:LTS"
    },
    "versions": [
      "1.643-3build2",
      "1.643-3build3",
      "1.643-3ubuntu0.1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73193.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libdbi-perl",
          "binary_version": "1.643-3ubuntu0.3"
        }
      ],
      "availability": "No subscription required"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.643-4ubuntu0.3"
          }
        ]
      }
    ],
    "package": {
      "name": "libdbi-perl",
      "purl": "pkg:deb/ubuntu/libdbi-perl?arch=source&distro=noble",
      "ecosystem": "Ubuntu:24.04:LTS"
    },
    "versions": [
      "1.643-4",
      "1.643-4build1",
      "1.643-4build2",
      "1.643-4build3",
      "1.643-4ubuntu0.1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73193.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libdbi-perl",
          "binary_version": "1.643-4ubuntu0.3"
        }
      ],
      "availability": "No subscription required"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.647-1ubuntu0.26.04.3"
          }
        ]
      }
    ],
    "package": {
      "name": "libdbi-perl",
      "purl": "pkg:deb/ubuntu/libdbi-perl?arch=source&distro=resolute",
      "ecosystem": "Ubuntu:26.04:LTS"
    },
    "versions": [
      "1.647-1",
      "1.647-1build1",
      "1.647-1ubuntu0.26.04.1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73193.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libdbi-perl",
          "binary_version": "1.647-1ubuntu0.26.04.3"
        }
      ],
      "availability": "No subscription required"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #37325 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 10:11:13 GMT
Publisher date: Sat, 15 Aug 2026 13:17:00 GMT

Read the original announcement

Revision history

25 Oct 2026UBUNTU-CVE-2026-73193 · Revision 1Source updated