CVE-2026-4426

MEDIUM

6.5

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published3/19/2026

Last Modified3/20/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-1335

References

https://access.redhat.com/security/cve/CVE-2026-4426(secalert@redhat.com)

https://bugzilla.redhat.com/show_bug.cgi?id=2449010(secalert@redhat.com)

https://github.com/libarchive/libarchive/pull/2897(secalert@redhat.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.