UnratedFix available

DEBIAN-CVE-2026-5745

Type: advisorySource: OSV1 source record

A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_text_nl() function. When processing a malformed ACL string (such as a bare "d" or "default" tag without subsequent fields), the function fails to perform adequate validation before advancing the pointer. An attacker can exploit this by providing a maliciously crafted archive, causing an application utilizing the libarchive API (such as bsdtar) to crash, resulting in a Denial of Service (DoS).

Announced 7 Apr 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-5745

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:DEBIAN-CVE-2026-5745

libarchive

Source reference: /affected/0/package/name

Affected versions: 3.6.2-1
Source reference: /affected/0/versions
3.6.2-1+deb12u1
Source reference: /affected/0/versions
3.6.2-1+deb12u2
Source reference: /affected/0/versions
3.6.2-1+deb12u3
Source reference: /affected/0/versions
3.6.2-1+deb12u4
Source reference: /affected/0/versions
3.6.2-1+deb12u5
Source reference: /affected/0/versions
3.7.2-1
Source reference: /affected/0/versions
3.7.2-1.1
Source reference: /affected/0/versions
3.7.2-1.1~exp1
Source reference: /affected/0/versions
3.7.2-2
Source reference: /affected/0/versions
3.7.2-2.1
Source reference: /affected/0/versions
3.7.4-1
Source reference: /affected/0/versions
3.7.4-1.1
Source reference: /affected/0/versions
3.7.4-2
Source reference: /affected/0/versions
3.7.4-3
Source reference: /affected/0/versions
3.7.4-4
Source reference: /affected/0/versions
3.8.4-1
Source reference: /affected/0/versions
3.8.5-1
Source reference: /affected/0/versions
3.8.6-1
Source reference: /affected/0/versions
3.8.7-1
Source reference: /affected/0/versions
3.8.8-1
Source reference: /affected/0/versions
3.8.8-2
Source reference: /affected/0/versions
3.8.9-1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

libarchive

Source reference: /affected/1/package/name

Affected versions: 3.7.4-4
Source reference: /affected/1/versions
3.7.4-4+deb13u1
Source reference: /affected/1/versions
3.8.4-1
Source reference: /affected/1/versions
3.8.5-1
Source reference: /affected/1/versions
3.8.6-1
Source reference: /affected/1/versions
3.8.7-1
Source reference: /affected/1/versions
3.8.8-1
Source reference: /affected/1/versions
3.8.8-2
Source reference: /affected/1/versions
3.8.9-1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

libarchive

Source reference: /affected/2/package/name

Affected versions: 3.7.4-4
Source reference: /affected/2/versions
3.8.4-1
Source reference: /affected/2/versions
3.8.5-1
Source reference: /affected/2/versions
3.8.6-1
Source reference: /affected/2/versions
3.8.7-1
Source reference: /affected/2/versions
Fixed versions: 3.8.8-1
Source reference: /affected/2/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"
          }
        ]
      }
    ],
    "package": {
      "name": "libarchive",
      "purl": "pkg:deb/debian/libarchive?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.6.2-1",
      "3.6.2-1+deb12u1",
      "3.6.2-1+deb12u2",
      "3.6.2-1+deb12u3",
      "3.6.2-1+deb12u4",
      "3.6.2-1+deb12u5",
      "3.7.2-1",
      "3.7.2-1.1",
      "3.7.2-1.1~exp1",
      "3.7.2-2",
      "3.7.2-2.1",
      "3.7.4-1",
      "3.7.4-1.1",
      "3.7.4-2",
      "3.7.4-3",
      "3.7.4-4",
      "3.8.4-1",
      "3.8.5-1",
      "3.8.6-1",
      "3.8.7-1",
      "3.8.8-1",
      "3.8.8-2",
      "3.8.9-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5745.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "libarchive",
      "purl": "pkg:deb/debian/libarchive?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.7.4-4",
      "3.7.4-4+deb13u1",
      "3.8.4-1",
      "3.8.5-1",
      "3.8.6-1",
      "3.8.7-1",
      "3.8.8-1",
      "3.8.8-2",
      "3.8.9-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5745.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.8.8-1"
          }
        ]
      }
    ],
    "package": {
      "name": "libarchive",
      "purl": "pkg:deb/debian/libarchive?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.7.4-4",
      "3.8.4-1",
      "3.8.5-1",
      "3.8.6-1",
      "3.8.7-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5745.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #57962 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 17:33:22 GMT
Publisher date: Tue, 07 Apr 2026 16:16:32 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-5745 · Revision 1Source updated