NULL Pointer Dereference in libarchive Affects Multiple Products
CVE-2026-5745

5.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Hardened Images
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Vendor
CVE Published:
7 April 2026

What is CVE-2026-5745?

A flaw in libarchive's ACL parsing logic allows for a NULL pointer dereference when handling malformed ACL strings. Specifically, the function archive_acl_from_text_nl() does not utilize proper validation before processing, enabling an attacker to exploit this by crafting a malicious archive. This vulnerability can lead to the crashing of applications that depend on the libarchive API, such as bsdtar, thereby causing a Denial of Service (DoS). It is crucial for users of affected products to implement mitigations and consider upgrades to safeguard their systems.

Affected Version(s)

Red Hat Hardened Images 3.8.7-1.hum1

References

https://access.redhat.com/errata/RHSA-2026:8944
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-5745
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2455921
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.