Home

Description

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).

PUBLISHED Reserved 2026-04-07 | Published 2026-04-07 | Updated 2026-05-03 | Assigner redhat




MEDIUM: 5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem types

NULL Pointer Dereference

Product status

Default status
affected

3.8.7-1.hum1 (rpm) before *
unaffected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-04-07:Reported to Red Hat.
2026-04-07:Made public.

References

access.redhat.com/errata/RHSA-2026:8944 (RHSA-2026:8944) vendor-advisory

access.redhat.com/security/cve/CVE-2026-5745 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2455921 (RHBZ#2455921) issue-tracking

cve.org (CVE-2026-5745)

nvd.nist.gov (CVE-2026-5745)

Download JSON