CVE-2026-5745: A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically…
CVE-2026-5745 · Severity: medium · CVSS 5.5 · Published 2026-04-07
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).
No. Junglewise Threat Intelligence has no report of CVE-2026-5745 being exploited in the wild.
How severe is CVE-2026-5745?
Medium severity, with a CVSS score of 5.5, published 7 April 2026.
Which products and versions are affected?
Libarchive, Redhat Enterprise Linux, Redhat Hardened Images, Redhat Openshift Container Platform. The advisory does not name versions.
Is there a fix for CVE-2026-5745?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-5745?
Check whether you run Libarchive, Redhat Enterprise Linux, Redhat Hardened Images or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.