A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter(). A client that sets up multiple SyncCounters and awaits on those triggers can trigger a use-after-free when destroying those counters via a second client connection. This may be used to crash the server, or for privilege escalation if the X server runs as root.
References
Configurations
Configuration 1 (hide)
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History
No history.
Information
Published : 2026-06-05 12:16
Updated : 2026-08-05 13:23
NVD link : CVE-2026-50260
Mitre link : CVE-2026-50260
CVE.ORG link : CVE-2026-50260
JSON object : View
Products Affected
x.org
- x_server
- xwayland
redhat
- enterprise_linux
CWE
CWE-416
Use After Free
