PT-2026-26290 · Red Hat · Red Hat Enterprise Linux 10+5

Published 2026-03-19 · Updated 2026-03-19 · CVE-2026-4426

Mitre

CVSS v3.1

6.5

Medium

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (pz log2 bs) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.

Fix

Weakness Enumeration

CWE-1335

Related Identifiers

CVE-2026-4426

Affected Products

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 Openshift Container Platform 4

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-4426 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-4426 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2449010 · Note
• https://github.com/libarchive/libarchive/pull/2897 · Note