CVE-2026-5121 identifies a critical integer overflow vulnerability in libarchive's zisofs block pointer allocation logic, specifically impacting 32-bit systems. A remote attacker can exploit this flaw by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow and potential arbitrary code execution. This vulnerability carries a CVSS score of 9.8 Critical due to its network attack vector and low attack complexity. Despite its severity, there is currently no evidence of active exploitation, no known public exploit code available (e.g., Metasploit, Nuclei, ExploitDB), and minimal community discussion surrounding it.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* | ||
4.0CPE matchmatch criteria | cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* | ||
6.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | ||
7.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.