CVE-2026-5121
High
Description
A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Libarchive
PublishedMar 30, 2026
First seenMar 30, 2026
Weakness typeCWE-190Integer overflow
How to fix
Vendor advisories
- access.redhat.com/errata/RHSA-2026:10065
- access.redhat.com/errata/RHSA-2026:10097
- access.redhat.com/errata/RHSA-2026:11768
- access.redhat.com/errata/RHSA-2026:12071
- access.redhat.com/errata/RHSA-2026:12274
- access.redhat.com/errata/RHSA-2026:13812
- access.redhat.com/errata/RHSA-2026:14773
- access.redhat.com/errata/RHSA-2026:14937
- access.redhat.com/errata/RHSA-2026:15087
- access.redhat.com/errata/RHSA-2026:16008
- access.redhat.com/errata/RHSA-2026:16009
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libarchive libarchive | No range specified | — |
| redhat hardened_images | No range specified | — |
| redhat openshift_container_platform | 4.0 | — |
| redhat enterprise_linux | 6.0, 7.0, 8.0, 9.0, 10.0 | — |
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