{"id":"CVE-2026-5121","title":"A flaw was found in libarchive","summary":"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 t…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-190"],"vendor":"libarchive","product":"libarchive","affected":["libarchive","hardened_images","openshift_container_platform = 4.0","enterprise_linux = 6.0","enterprise_linux = 7.0","enterprise_linux = 8.0","enterprise_linux = 9.0","enterprise_linux = 10.0"],"patched":["enterprise_linux_server_v_7_els","enterprise_linux_server_optional_v_7_els","openshift_container_platform 4.12","middleware_containers_for_openshift","openshift_container_platform 4.13","openshift_container_platform 4.14","openshift_container_platform 4.15","openshift_container_platform 4.16","openshift_container_platform 4.17","openshift_container_platform 4.18","openshift_container_platform 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5"],"published":"2026-03-30","updated":"2026-10-14","sourceUpdated":"2026-10-14T20:17:56.487","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-5121","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:10065","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:10097","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:11768","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:12071","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:12274","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:13812","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:14773","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:14937","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:15087","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:16008","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:16009","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:16030","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:16174","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:17596","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:19724","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:19725","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:20040","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:21690","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:25096","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:72502","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82304","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82322","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82347","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82354","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82372","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82857","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82888","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8510","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8517","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8521","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8534","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8864","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8866","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8867","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8873","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8908","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:8944","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:9026","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:9592","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:9832","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-5121","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452945","label":"secalert@redhat.com"},{"url":"https://github.com/advisories/GHSA-2vwv-vqpv-v8vc","label":"secalert@redhat.com"},{"url":"https://github.com/libarchive/libarchive/pull/2934","label":"secalert@redhat.com"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-585531.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5121.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-5121"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5121"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.01092,"epssPercentile":0.65244,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-03-31T03:55:34.402717Z"},"ingestedAt":"2026-09-01T14:27:54.391Z","slug":"CVE-2026-5121","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `libarchive`\n- `hardened_images`\n- `openshift_container_platform = 4.0`\n- `enterprise_linux = 6.0`\n- `enterprise_linux = 7.0`\n- `enterprise_linux = 8.0`\n- `enterprise_linux = 9.0`\n- `enterprise_linux = 10.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:8517** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · released 2026-04-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:8517)\n- **RHSA-2026:12274** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.12 · released 2026-05-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:12274)\n- **RHSA-2026:13812** · Red Hat · fixed in: Middleware Containers for OpenShift · released 2026-05-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:13812)\n- **RHSA-2026:21690** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.13 · released 2026-06-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:21690)\n- **RHSA-2026:15087** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.14 · released 2026-05-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:15087)\n- **RHSA-2026:14773** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.15 · released 2026-05-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:14773)\n- **RHSA-2026:10097** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.16 · released 2026-04-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:10097)\n- **RHSA-2026:17596** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.17 · released 2026-05-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:17596)\n- **RHSA-2026:12071** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.18 · released 2026-05-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:12071)\n- **RHSA-2026:20040** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-05-27 · [advisory](https://access.redhat.com/errata/RHSA-2026:20040)\n- **RHSA-2026:8867** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux BaseOS E4S (v.9.0) · released 2026-04-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:8867)\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 · updated 2026-10-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5121.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}