--- 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 4.19 - enterprise_linux_appstream_e4s_v_9_0 - enterprise_linux_appstream_e4s_v_9_2 - enterprise_linux_appstream_eus_v_9_4 - enterprise_linux_appstream_eus_v_9_6 - enterprise_linux_appstream_v_9 - enterprise_linux_baseos_v_8 - enterprise_linux_baseos_aus_v_8_2 - enterprise_linux_baseos_aus_v_8_4 - enterprise_linux_baseos_eus_extension_v_8_4 - enterprise_linux_baseos_aus_v_8_6 - enterprise_linux_baseos_e4s_v_8_6 - enterprise_linux_baseos_tus_v_8_6 - enterprise_linux_baseos_e4s_v_8_8 - enterprise_linux_baseos_tus_v_8_8 - enterprise_linux_baseos_e4s_v_9_0 - enterprise_linux_baseos_e4s_v_9_2 - enterprise_linux_baseos_eus_v_9_4 - enterprise_linux_baseos_eus_v_9_6 - enterprise_linux_baseos_v_9 - enterprise_linux_crb_v_8 - codeready_linux_builder_eus_v_9_4 - cert_manager_support_for_red_hat_openshift_release 1.20 - ai_inference_server 3.2 - ai_inference_server 3.3 - discovery 2 - hardened_images - insights_proxy 1.5 - update_infrastructure 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' --- ## Overview 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. ## 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` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **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) - **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) - **RHSA-2026:13812** · Red Hat · fixed in: Middleware Containers for OpenShift · released 2026-05-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:13812) - **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) - **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) - **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) - **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) - **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) - **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) - **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) - **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) - **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)