CVE-2026-41045 Details
Description
A time-to-check-time-of-use in polkit authentication of qSnapper before version 1.3.3 allowed a local attacker to bypass qSnappers authentication mechanism and operate e.g. as root user.
A time-to-check-time-of-use vulnerability has been identified in qSnapper, a GUI frontend for managing Btrfs snapshots. This issue affects versions prior to 1.3.3 and allows local attackers to bypass the application's authentication mechanism, potentially gaining root privileges. The vulnerability arises from an improper use of Polkit's UnixProcessSubject for client authentication, which is susceptible to race conditions. Exploitation can be achieved by manipulating the timing of process ID checks, enabling unauthorized actions that require administrative rights.
Users can upgrade to qSnapper version 1.3.3, which addresses this vulnerability by replacing the problematic UnixProcessSubject with the SystemBusNameSubject, eliminating the race condition. The update is available through the qSnapper GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 22, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.suse.com/show_bug.cgi?id=1261795 | [email protected] | Third Party Advisory |
| https://github.com/presire/qSnapper/releases/tag/v1.3.3 | [email protected] | Release Notes |
| https://security.opensuse.org/2026/05/26/qsnapper-dbus-issues.html#issue-polkit-bypass | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-367 | Time-of-check Time-of-use (TOCTOU) Race Condition | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| presire qsnapper | < 1.3.3 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 28, 2026 | Initial Analysis | [email protected] |
| Jun 22, 2026 | CVE Modified | CISA-ADP |
| Jun 22, 2026 | New CVE Received | [email protected] |