Security update for python-filelock SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2026:0335-1 Final 1 1 2026-01-29T10:15:42Z current 2026-01-29T10:15:42Z 2026-01-29T10:15:42Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for python-filelock This update for python-filelock fixes the following issues: - CVE-2026-22701: Fixed TOCTOU race condition in SoftFileLock implementation of he filelock package (bsc#1256457) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2026-335,SUSE-SLE-Module-Development-Tools-15-SP7-2026-335,SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-335 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2026/suse-su-20260335-1/ Link for SUSE-SU-2026:0335-1 https://lists.suse.com/pipermail/sle-security-updates/2026-January/023987.html E-Mail link for SUSE-SU-2026:0335-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1256457 SUSE Bug 1256457 https://www.suse.com/security/cve/CVE-2026-22701/ SUSE CVE CVE-2026-22701 page SUSE Linux Enterprise Module for Development Tools 15 SP7 SUSE Linux Enterprise Module for Package Hub 15 SP7 python2-filelock-3.0.12-150100.3.9.1 python3-filelock-3.0.12-150100.3.9.1 python3-filelock-3.0.12-150100.3.9.1 as a component of SUSE Linux Enterprise Module for Development Tools 15 SP7 python3-filelock-3.0.12-150100.3.9.1 as a component of SUSE Linux Enterprise Module for Package Hub 15 SP7 filelock is a platform-independent file lock for Python. Prior to version 3.20.3, a TOCTOU race condition vulnerability exists in the SoftFileLock implementation of the filelock package. An attacker with local filesystem access and permission to create symlinks can exploit a race condition between the permission validation and file creation to cause lock operations to fail or behave unexpectedly. The vulnerability occurs in the _acquire() method between raise_on_not_writable_file() (permission check) and os.open() (file creation). During this race window, an attacker can create a symlink at the lock file path, potentially causing the lock to operate on an unintended target file or leading to denial of service. This issue has been patched in version 3.20.3. CVE-2026-22701 SUSE Linux Enterprise Module for Development Tools 15 SP7:python3-filelock-3.0.12-150100.3.9.1 SUSE Linux Enterprise Module for Package Hub 15 SP7:python3-filelock-3.0.12-150100.3.9.1 moderate 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/2026/suse-su-20260335-1/ https://www.suse.com/security/cve/CVE-2026-22701.html CVE-2026-22701 https://bugzilla.suse.com/1256457 SUSE Bug 1256457