CVE-2026-5745

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).

Score
CVSS 3.1 5.5 Medium
Status
Modified - secalert@redhat.com
Published
2026-04-07
Last modified
2026-10-26
Weaknesses
CWE-476

Affected products

References

 
 
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