Upstream information

CVE-2026-22701 at MITRE

Description

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.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail CNA (GitHub) SUSE
Base Score 5.3 5.3
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
Attack Vector Local Local
Attack Complexity High High
Privileges Required Low Low
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact Low Low
Availability Impact High High
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail SUSE
Base Score 5.8
Vector CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Attack Vector Local
Attack Complexity High
Attack Requirements Present
Privileges Required Low
User Interaction None
Vulnerable System Confidentiality Impact None
Vulnerable System Integrity Impact Low
Vulnerable System Availability Impact High
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1256457 [NEW]

No SUSE Security Announcements cross referenced.

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7 python-filelock Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 python-filelock Affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 python-filelock Affected
SUSE Linux Enterprise Module for Package Hub 15 SP5 python-filelock Affected
SUSE Linux Enterprise Module for Package Hub 15 SP6 python-filelock Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 python-filelock Affected
SUSE Linux Enterprise Module for Python 3 15 SP7 python-filelock Affected
SUSE Linux Enterprise Server 15 SP7 python-filelock Affected
SUSE Linux Enterprise Server 16.0 python-filelock Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 python-filelock Affected
SUSE Linux Enterprise Server for SAP applications 16.0 python-filelock Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4 python-filelock Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python-filelock Affected
SUSE Linux Enterprise High Performance Computing 15 SP5 python-filelock Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS python-filelock Affected
SUSE Linux Enterprise Module for Python 3 15 SP4 python-filelock Affected
SUSE Linux Enterprise Module for Python 3 15 SP5 python-filelock Affected
SUSE Linux Enterprise Server 15 SP4 python-filelock Affected
SUSE Linux Enterprise Server 15 SP4-LTSS python-filelock Affected
SUSE Linux Enterprise Server 15 SP5 python-filelock Affected
SUSE Linux Enterprise Server 15 SP5-LTSS python-filelock Affected
SUSE Linux Enterprise Server 15 SP6-LTSS python-filelock Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 python-filelock Affected
SUSE Manager Proxy 4.3 python-filelock Affected
SUSE Manager Retail Branch Server 4.3 python-filelock Affected
SUSE Manager Server 4.3 python-filelock Affected
Products past their end of life and not receiving proactive updates anymore.
SUSE Linux Enterprise Desktop 15 SP4 python-filelock Affected
SUSE Linux Enterprise Desktop 15 SP5 python-filelock Affected
SUSE Linux Enterprise Desktop 15 SP6 python-filelock Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS python-filelock Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS python-filelock Affected
SUSE Linux Enterprise High Performance Computing 15 SP6 python-filelock Affected
SUSE Linux Enterprise Module for Development Tools 15 SP6 python-filelock Affected
SUSE Linux Enterprise Module for Package Hub 15 SP4 python-filelock Affected
SUSE Linux Enterprise Module for Python 3 15 SP6 python-filelock Affected
SUSE Linux Enterprise Server 15 SP6 python-filelock Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 python-filelock Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 python-filelock Affected
openSUSE Leap 15.3 python-filelock Affected
openSUSE Leap 15.4 python-filelock Affected
openSUSE Leap 15.5 python-filelock Affected
openSUSE Leap 15.6 python-filelock Affected
Products at an unknown state of their lifecycle.
SUSE Linux Enterprise Server for SAP Applications 16.0 python-filelock Affected

SUSE Timeline for this CVE

CVE page created: Sat Jan 10 08:00:14 2026
CVE page last modified: Mon Jan 12 12:42:36 2026