Debian/xorg-server: high 7.8
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
Action: Upgrade xorg-server to 2:21.1.23-1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2:21.1.23-1 | - |
Fixed versions
| 2:21.1.23-1 |
Sources
- osv: DEBIAN-CVE-2026-50261#Debian:14/xorg-server
- https://security-tracker.debian.org/tracker/CVE-2026-50261
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