What is CVE-2026-5745?

CVE-2026-5745 is a medium-severity vulnerability in Libarchive, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-04-07.

How severe is CVE-2026-5745?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Libarchive

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"…

EPSS: 0.000 (0.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Libarchive
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Hardened Images — versions 3.8.7-1.hum1
Red Hat Openshift Container Platform 4
Redhat Enterprise_linux — versions 6.0, 7.0, 8.0
Redhat Hardened_images

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

RHSA-2026:8944 (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
RHBZ#2455921 (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2026-5745?: CVE-2026-5745 is a medium-severity vulnerability in Libarchive, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-04-07.
How severe is CVE-2026-5745?: Medium severity. CVSS v3 base score is 5.5 out of 10.