--- id: CVE-2026-4111 title: >- A flaw was identified in the RAR5 archive decompression logic of the libarchive library, specifically within the archive_read_data() processing path summary: >- A flaw was identified in the RAR5 archive decompression logic of the libarchive library, specifically within the archive_read_data() processing path. When a specially crafted RAR5 archive is processed, the decompression routine may enter… severity: high cvss: 7.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-835 vendor: Red Hat product: Red Hat Enterprise Linux AppStream EUS (v.9.6) affected: - enterprise_linux 6 - 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_eus_v_10_0 - enterprise_linux_appstream_v_10 - 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_eus_v_10_0 - enterprise_linux_baseos_v_10 - 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 - codeready_linux_builder_eus_v_9_4 - cert_manager_support_for_red_hat_openshift_release 1.18 - ai_inference_server 3.2 - ai_inference_server 3.3 - discovery 2 - hardened_images - insights_proxy 1.5 - update_infrastructure 5 patched: - 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_eus_v_10_0 - enterprise_linux_appstream_v_10 - 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_eus_v_10_0 - enterprise_linux_baseos_v_10 - 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 - codeready_linux_builder_eus_v_9_4 - cert_manager_support_for_red_hat_openshift_release 1.18 - ai_inference_server 3.2 - ai_inference_server 3.3 - discovery 2 - hardened_images - insights_proxy 1.5 - update_infrastructure 5 published: '2026-03-13' updated: '2026-10-14' sourceUpdated: '2026-10-14T20:17:45.090' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-4111' references: - url: 'https://access.redhat.com/errata/RHSA-2026:10065' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:10081' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:10097' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:14773' 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-2026:16174' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:17596' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:25096' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:5063' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:5080' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:6647' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:7093' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:7105' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:7106' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:7239' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:7329' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:7335' 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-2026:8423' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:8746' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:8747' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:8748' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:8865' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:8944' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:9832' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2026-4111' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2446453' label: secalert@redhat.com - url: 'https://github.com/libarchive/libarchive/pull/2877' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:10065' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:10081' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:10097' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:14773' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:15087' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:16008' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:16009' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:16174' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:17596' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:25096' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:5063' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:5080' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:6647' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:7093' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:7105' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:7106' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:7239' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:7329' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:7335' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:8423' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:8746' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:8747' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:8748' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:8865' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:8944' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:9832' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-4111' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2446453' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4111.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://www.cve.org/CVERecord?id=CVE-2026-4111' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-4111' tags: - nvd - csaf - vex - red-hat - cve.org epss: 0.00705 epssPercentile: 0.53161 ingestedAt: '2026-08-31T18:12:24.310Z' ssvc: exploitation: none automatable: 'yes' technicalImpact: partial timestamp: '2026-03-13T13:36:13.170394Z' --- ## Overview A flaw was identified in the RAR5 archive decompression logic of the libarchive library, specifically within the archive_read_data() processing path. When a specially crafted RAR5 archive is processed, the decompression routine may enter a state where internal logic prevents forward progress. This condition results in an infinite loop that continuously consumes CPU resources. Because the archive passes checksum validation and appears structurally valid, affected applications cannot detect the issue before processing. This can allow attackers to cause persistent denial-of-service conditions in services that automatically process archives. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2026:7239** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.13 · released 2026-04-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:7239) - **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-2026:8423** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.18 · released 2026-04-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:8423) - **RHSA-2026:10081** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-04-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:10081) - **RHSA-2026:8865** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0) · released 2026-04-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:8865) - **RHSA-2026:5063** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) · released 2026-03-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:5063) - **RHSA-2026:7093** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux BaseOS E4S (v.9.0) · released 2026-04-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:7093) - **RHSA-2026:6647** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2) · released 2026-04-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:6647) - **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4111.json)