CVE-2026-4426
Libarchive: libarchive: denial of service via malformed iso file processing
- State
- Published
- Severity
- 6.5 Medium
- Published
- Mar 19, 2026
- Updated
- Sep 1, 2026
- Reserved
- Mar 19, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-1335 Incorrect Bitwise Shift of Integer
Affected Products
| Product | Versions |
|---|---|
Red Hat Hardened ImagesRed Hat |
|
Red Hat Enterprise Linux 10Red Hat | |
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat |
References
- RHSA-2026:8944vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-4426vdb-entry
- RHBZ#2449010issue-tracking
- https://github.com/libarchive/libarchive/pull/2897
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