CVE-2026-41051 Details
Description
csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.
A denial-of-service vulnerability has been identified in Csync2, a cluster synchronization tool, when compiled with C99 or later. The issue arises from the use of insecure temporary directories for storing intermediate results, which creates a vulnerability to local denial-of-service attacks. This problem is caused by a faulty autotools macro that fails to properly detect the presence of the secure 'mkstemp' function, leading to the use of unsafe temporary file handling.
The vulnerability can be addressed by modifying the 'configure.ac' file to include a proper return type for the 'main' function in the 'AC_TRY_RUN' check for secure 'mkstemp' availability. This adjustment will allow the autotools macro to correctly detect 'mkstemp', preventing the use of insecure temporary directories.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-41051 | [email protected] |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-367 | Time-of-check Time-of-use (TOCTOU) Race Condition | CISA-ADP |
Affected Products
No affected product data is available for this CVE.
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | New CVE Received | [email protected] |