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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 8
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Libarchive Libarchive
cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:*
|
— | — |
|
Redhat Hardened_Images
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
|
— | — |
|
Redhat Openshift_Container_Platform
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
|
— | — |
|
Redhat Enterprise_Linux
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
|
— | — |
|
Redhat Enterprise_Linux
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
|
— | — |
|
Redhat Enterprise_Linux
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
|
— | — |
|
Redhat Enterprise_Linux
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
|
— | — |
|
Redhat Enterprise_Linux
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
|
— | — |
References 8
https://access.redhat.com/security/cve/CVE-2026-5121
secalert@redhat.com
https://github.com/libarchive/libarchive/pull/2934
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:8510
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:8517
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:8521
secalert@redhat.com
https://access.redhat.com/errata/RHSA-2026:8534
secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2452945
secalert@redhat.com
https://github.com/advisories/GHSA-2vwv-vqpv-v8vc
secalert@redhat.com