A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.
CVE-2025-49177
CVSS base score
6.1 (v3.1)
Severity
MEDIUM
Attack vector
Local
Weakness
CWE-200
Last modified
November 4, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L