CVE-2026-4426

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-4426
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.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://access.redhat.com/errata/RHSA-2026:8944
https://access.redhat.com/security/cve/CVE-2026-4426 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2449010 Issue Tracking Third Party Advisory
https://github.com/libarchive/libarchive/pull/2897 Issue Tracking Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
History

03 May 2026, 21:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:8944 -

28 Apr 2026, 21:38

Type Values Removed Values Added
First Time Redhat
Redhat enterprise Linux
Libarchive libarchive
Libarchive
Redhat hardened Images
Redhat openshift Container Platform
Summary
  • (es) Se encontró un defecto en libarchive. Existe una vulnerabilidad de comportamiento indefinido en la lógica de descompresión de zisofs, causada por una validación incorrecta de un campo ('pz_log2_bs') leído de las extensiones Rock Ridge de ISO9660. Un atacante remoto puede explotar esto al proporcionar un archivo ISO especialmente diseñado. Esto puede llevar a una asignación de memoria incorrecta y posibles caídas de la aplicación, lo que resulta en una condición de denegación de servicio (DoS).
References () https://access.redhat.com/security/cve/CVE-2026-4426 - () https://access.redhat.com/security/cve/CVE-2026-4426 - Third Party Advisory
References () https://bugzilla.redhat.com/show_bug.cgi?id=2449010 - () https://bugzilla.redhat.com/show_bug.cgi?id=2449010 - Issue Tracking, Third Party Advisory
References () https://github.com/libarchive/libarchive/pull/2897 - () https://github.com/libarchive/libarchive/pull/2897 - Issue Tracking, Patch
CPE cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:*

19 Mar 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-19 15:16

Updated : 2026-05-03 21:16

NVD link : CVE-2026-4426

Mitre link : CVE-2026-4426

CVE.ORG link : CVE-2026-4426

JSON object : View

Products Affected

redhat

  • enterprise_linux
  • hardened_images
  • openshift_container_platform

libarchive

  • libarchive
CWE
CWE-1335

Incorrect Bitwise Shift of Integer