CVE-2026-4426

MEDIUM EPSS 22.2%
Published Mar 19, 20263mo ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Mar 19, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
22.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-1335

Affected Products 8

VendorProductVersionRange
libarchivelibarchive*any
redhathardened_images*any
redhatopenshift_container_platform4.0any
redhatenterprise_linux6.0any
redhatenterprise_linux7.0any
redhatenterprise_linux8.0any
redhatenterprise_linux9.0any
redhatenterprise_linux10.0any

References 4

  • access.redhat.com https://access.redhat.com/errata/RHSA-2026:8944
  • access.redhat.com https://access.redhat.com/security/cve/CVE-2026-4426
    Third Party Advisory
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2449010
    Issue TrackingThird Party Advisory
  • github.com https://github.com/libarchive/libarchive/pull/2897
    Issue TrackingPatch

Remediation

  • github.com https://github.com/libarchive/libarchive/pull/2897
    Issue TrackingPatch