PT-2026-46941 · X.Org Foundation+1 · Xwayland+2
CVE-2026-50261
·
Published
2026-04-20
·
Updated
2026-07-13
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
X.Org X server (affected versions not specified)
Xwayland (affected versions not specified)
Description
A use-after-free flaw exists in the
SyncChangeCounter() function. A client that establishes multiple SyncCounters can trigger this condition by destroying those counters through a second client connection while simultaneously changing them. This flaw can lead to a server crash or privilege escalation if the X server is running with root privileges.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
LPE
DoS
Use After Free
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Rocky Linux
X.Org Server
Xwayland