CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 7.8. See the original NVD description below for full technical details.
CVE
CVE-2026-50261
Severity
HIGH
CVSS
7.8
EPSS
0.15%
Original NVD Description
A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Related CVEs
Other vulnerabilities affecting the same vendor(s)