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.
History

Tue, 31 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-190
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 31 Mar 2026 03:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-122
CWE-680

Mon, 30 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Mon, 30 Mar 2026 08:15:00 +0000

Type Values Removed Values Added
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.
Title Libarchive: libarchive: arbitrary code execution via integer overflow in iso9660 image processing
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
CPEs cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift
References

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-03-30T07:47:28.562Z

Updated: 2026-03-31T13:52:02.886Z

Reserved: 2026-03-30T07:39:27.352Z

Link: CVE-2026-5121

cve-icon Vulnrichment

Updated: 2026-03-31T13:51:59.651Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-30T08:16:18.780

Modified: 2026-03-31T15:16:22.173

Link: CVE-2026-5121

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-03-30T07:44:15Z

Links: CVE-2026-5121 - Bugzilla