Security update for buildah SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:4076-1 Final 1 1 2025-11-12T10:35:40Z current 2025-11-12T10:35:40Z 2025-11-12T10:35:40Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for buildah This update for buildah fixes the following issues: - CVE-2025-52881: Fixed container breakouts by bypassing runc's restrictions for writing to arbitrary /proc files (bsc#1253096) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2025-4076,SUSE-SLE-Module-Containers-15-SP6-2025-4076,SUSE-SLE-Module-Containers-15-SP7-2025-4076,SUSE-SLE-Product-HPC-15-SP5-ESPOS-2025-4076,SUSE-SLE-Product-HPC-15-SP5-LTSS-2025-4076,SUSE-SLE-Product-SLES-15-SP5-LTSS-2025-4076,SUSE-SLE-Product-SLES_SAP-15-SP5-2025-4076,openSUSE-SLE-15.6-2025-4076 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2025/suse-su-20254076-1/ Link for SUSE-SU-2025:4076-1 https://lists.suse.com/pipermail/sle-security-updates/2025-November/023262.html E-Mail link for SUSE-SU-2025:4076-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1253096 SUSE Bug 1253096 https://www.suse.com/security/cve/CVE-2025-52881/ SUSE CVE CVE-2025-52881 page SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS SUSE Linux Enterprise Module for Containers 15 SP6 SUSE Linux Enterprise Module for Containers 15 SP7 SUSE Linux Enterprise Server 15 SP5-LTSS SUSE Linux Enterprise Server for SAP Applications 15 SP5 openSUSE Leap 15.6 buildah-1.35.5-150500.3.45.1 buildah-1.35.5-150500.3.45.1 as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS buildah-1.35.5-150500.3.45.1 as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS buildah-1.35.5-150500.3.45.1 as a component of SUSE Linux Enterprise Module for Containers 15 SP6 buildah-1.35.5-150500.3.45.1 as a component of SUSE Linux Enterprise Module for Containers 15 SP7 buildah-1.35.5-150500.3.45.1 as a component of SUSE Linux Enterprise Server 15 SP5-LTSS buildah-1.35.5-150500.3.45.1 as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 buildah-1.35.5-150500.3.45.1 as a component of openSUSE Leap 15.6 runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7, 1.3.2 and 1.4.0-rc.2, an attacker can trick runc into misdirecting writes to /proc to other procfs files through the use of a racing container with shared mounts (we have also verified this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts. While similar, the mitigation applied for the related CVE, CVE-2019-19921, was fairly limited and effectively only caused runc to verify that when LSM labels are written they are actually procfs files. This issue is fixed in versions 1.2.8, 1.3.3, and 1.4.0-rc.3. CVE-2025-52881 SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:buildah-1.35.5-150500.3.45.1 SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:buildah-1.35.5-150500.3.45.1 SUSE Linux Enterprise Module for Containers 15 SP6:buildah-1.35.5-150500.3.45.1 SUSE Linux Enterprise Module for Containers 15 SP7:buildah-1.35.5-150500.3.45.1 SUSE Linux Enterprise Server 15 SP5-LTSS:buildah-1.35.5-150500.3.45.1 SUSE Linux Enterprise Server for SAP Applications 15 SP5:buildah-1.35.5-150500.3.45.1 openSUSE Leap 15.6:buildah-1.35.5-150500.3.45.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-20254076-1/ https://www.suse.com/security/cve/CVE-2025-52881.html CVE-2025-52881 https://bugzilla.suse.com/1252232 SUSE Bug 1252232