CVE-2026-5121
Libarchive: libarchive: arbitrary code execution via integer overflow in iso9660 image processing
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.
INFO
Published Date :
March 30, 2026, 8:16 a.m.
Last Modified :
April 20, 2026, 2:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-5121
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update libarchive to the latest version.
- Apply vendor patches for memory corruption.
- Validate ISO image handling logic.
- Rebuild affected applications.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-5121.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-5121 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-5121
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-5121 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-5121 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:9026 -
CVE Modified by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:8866 -
CVE Modified by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:8908 -
CVE Modified by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:8873 -
CVE Modified by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:8864 -
CVE Modified by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:8867 -
CVE Modified by [email protected]
Apr. 16, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:8517 Added Reference https://access.redhat.com/errata/RHSA-2026:8521 -
CVE Modified by [email protected]
Apr. 16, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:8534 -
CVE Modified by [email protected]
Apr. 16, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:8510 -
CVE Modified by [email protected]
Apr. 14, 2026
Action Type Old Value New Value Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2452945 -
Initial Analysis by [email protected]
Apr. 14, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:* *cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* Added Reference Type Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-5121 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://github.com/advisories/GHSA-2vwv-vqpv-v8vc Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://github.com/libarchive/libarchive/pull/2934 Types: Issue Tracking, Patch -
CVE Modified by [email protected]
Apr. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-190 Added Reference https://github.com/advisories/GHSA-2vwv-vqpv-v8vc -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 31, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-190 -
New CVE Received by [email protected]
Mar. 30, 2026
Action Type Old Value New Value 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. Added Reference https://access.redhat.com/security/cve/CVE-2026-5121 Added Reference https://github.com/libarchive/libarchive/pull/2934