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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 Source 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
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Publisher date
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