๐Ÿ›ก๏ธ CVE-2026-50260
๐ŸŸ  CVSS 7.8 โ€” High โœ… No Known Exploit CWE-416 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-416
Public Exploit โœ… No
Source NVD
Published 2026-06-05
Updated 2026-06-12
Modified 2026-06-11

Affected Packages

Software From version Fixed in
enterprise-linux โ€” โ€”
unknown โ€” โ€”
x-server โ€” 21.1.23
xwayland โ€” 24.1.12

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