CVE-2026-4426

medium

Published 2026-03-19 · Modified 2026-05-03

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CVSS v3

6.5

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

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.

Predictions

Exploit likelihood

75%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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OS impact

Red Hat Affected 5 releases

Version	Status	Fixed in
10.0	Affected	—
9.0	Affected	—
8.0	Affected	—
7.0	Affected	—
6.0	Affected	—

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`3.7.4-4+deb13u1`
sid	Fixed	`3.8.7-1`
forky	Fixed	`3.8.7-1`
bullseye	Fixed	`3.4.3-2+deb11u4`
bookworm	Fixed	`3.6.2-1+deb12u4`

Application impact

Vendor	Product	Versions
libarchive	libarchive	`-`
redhat	hardened_images	`-`
redhat	openshift_container_platform	`4.0`

References

CWEs

CWE-1335

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.