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.
https://access.redhat.com/errata/RHSA-2025:9304
https://access.redhat.com/errata/RHSA-2025:10258
https://bugzilla.redhat.com/show_bug.cgi?id=2369955
https://access.redhat.com/security/cve/CVE-2025-49177
Source: Mitre, NVD
Published: 2025-06-17
Updated: 2025-07-02
Base Score: 5.2
Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:P
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
EPSS: 0.00012