CVE-2026-4426CWE-1335

CVE-2026-4426

Medium · published March 19, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
22.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00305 · 22.8th percentile
Weakness
CWE-1335 · Incorrect Bitwise Shift of Integer
Published
2026-03-19T19:16Z
Affected products (8)
ProductVersionsFixed in
libarchive/libarchiveall versions—
redhat/hardened_imagesall versions—
redhat/openshift_container_platformall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
References (4)
https://access.redhat.com/errata/RHSA-2026:8944 · [email protected]https://access.redhat.com/security/cve/CVE-2026-4426 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2449010 · [email protected]https://github.com/libarchive/libarchive/pull/2897 · [email protected]
EPSS history
Timeline
  • 19 MAR 13:53Z
    Libarchive: libarchive: denial of service via malformed iso file processing
    cvelistv5