Home

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.

PUBLISHED Reserved 2026-03-19 | Published 2026-03-19 | Updated 2026-05-03 | Assigner redhat




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem types

Incorrect Bitwise Shift of Integer

Product status

Default status
affected

3.8.7-1.hum1 (rpm) before *
unaffected

Default status
affected

Default status
unknown

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-03-19:Reported to Red Hat.
2026-03-19:Made public.

Credits

Red Hat would like to thank Elhanan Haenel for reporting this issue.

References

access.redhat.com/errata/RHSA-2026:8944 (RHSA-2026:8944) vendor-advisory

access.redhat.com/security/cve/CVE-2026-4426 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2449010 (RHBZ#2449010) issue-tracking

github.com/libarchive/libarchive/pull/2897

cve.org (CVE-2026-4426)

nvd.nist.gov (CVE-2026-4426)

Download JSON