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HIGH · 7.5

CVE-2026-5121

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 cr...

Vulnerability 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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
LibarchiveLibarchive-
RedhatHardened Images-
RedhatOpenshift Container Platform4.0
RedhatEnterprise Linux6.0

Related Weaknesses (CWE)

CWE-190

References

FAQ

What is CVE-2026-5121?

CVE-2026-5121 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 cr...

How severe is CVE-2026-5121?

CVE-2026-5121 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-5121?

Check the references section above for vendor advisories and patch information. Affected products include: Libarchive Libarchive, Redhat Hardened Images, Redhat Openshift Container Platform, Redhat Enterprise Linux.