{"cve":"CVE-2026-5121","nvd":{"published":"2026-03-30T08:16:18.780","modified":"2026-10-14T20:17:56.487","status":"Modified","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-190"],"references":["https://access.redhat.com/errata/RHSA-2026:10065","https://access.redhat.com/errata/RHSA-2026:10097","https://access.redhat.com/errata/RHSA-2026:11768","https://access.redhat.com/errata/RHSA-2026:12071","https://access.redhat.com/errata/RHSA-2026:12274"],"products":["libarchive:libarchive","redhat:enterprise_linux","redhat:hardened_images","redhat:openshift_container_platform"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-5121","score":0.01073,"percentile":0.64672,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}