libarchive13: A flaw was found in libarchive
CVE-2026-5745 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-5745, released April 7, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libarchive · Debian 14 | 3.8.8-1 | DEBIAN-CVE-2026-5745 | Apr 7, 2026 |
| libarchive-tools · Ubuntu 20.04 LTS (focal) | 3.4.0-2ubuntu1.5+esm3 | libarchive-tools 3.4.0-2ubuntu1.5+esm3 | Jul 24, 2026 |
| libarchive-tools · Ubuntu 22.04.1 LTS (jammy) | 3.6.0-1ubuntu1.8 | libarchive-tools 3.6.0-1ubuntu1.8 | Jul 24, 2026 |
| libarchive-tools · Ubuntu 24.04.5 LTS (noble) | 3.7.2-2ubuntu0.8 | libarchive-tools 3.7.2-2ubuntu0.8 | Jul 24, 2026 |
| libarchive-tools · Ubuntu 26.04.1 LTS (resolute) | 3.8.5-1ubuntu2.2 | libarchive-tools 3.8.5-1ubuntu2.2 | Jul 10, 2026 |
| libarchive13 · Ubuntu 20.04 LTS (focal) | 3.4.0-2ubuntu1.5+esm3 | libarchive13 3.4.0-2ubuntu1.5+esm3 | Jul 24, 2026 |
| libarchive13 · Ubuntu 22.04.1 LTS (jammy) | 3.6.0-1ubuntu1.8 | libarchive13 3.6.0-1ubuntu1.8 | Jul 24, 2026 |
| libarchive13t64 · Ubuntu 24.04.5 LTS (noble) | 3.7.2-2ubuntu0.8 | libarchive13t64 3.7.2-2ubuntu0.8 | Jul 24, 2026 |
| libarchive13t64 · Ubuntu 26.04.1 LTS (resolute) | 3.8.5-1ubuntu2.2 | libarchive13t64 3.8.5-1ubuntu2.2 | Jul 10, 2026 |
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