CVE-2026-4426

Published Mar 19, 2026

Last updated 22 days ago

CVSS medium 6.5

Overview

Description
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.
Source
secalert@redhat.com
NVD status
Modified
Products
libarchive, hardened_images, openshift_container_platform, enterprise_linux

Risk scores

CVSS 3.1

Type
Secondary
Base score
6.5
Impact score
3.6
Exploitability score
2.8
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Severity
MEDIUM

Weaknesses

secalert@redhat.com
CWE-1335

Social media

Hype score
Not currently trending

Configurations

Related CVEs

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References

Sources include official advisories and independent security research.