Fluid Attacks Database

Description

A use-after-free flaw was found in X.Org and Xwayland. When changing an alarm, the values of the change mask are evaluated one after the other, changing the trigger values as requested, and eventually, SyncInitTrigger() is called. If one of the changes triggers an error, the function will return early, not adding the new sync object, possibly causing a use-after-free when the alarm eventually triggers.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Package	Affected version	Patched versions
debian 12	xwayland	=2:22.1.9-1 \|\| =2:23.1.0-1 \|\| =2:23.1.1-1 \|\| =2:23.2.0-1 \|\| =2:23.2.1-1 \|\| =2:23.2.2-1 \|\| =2:23.2.3-1 \|\| =2:23.2.4-1 \|\| =2:23.2.6-1 \|\| =2:24.0.99.901-1 \|\| =2:24.1.0-1 \|\| =2:24.1.10-1 \|\| =2:24.1.11-1 \|\| =2:24.1.2-1 \|\| =2:24.1.3-1 \|\| =2:24.1.4-1 \|\| =2:24.1.4-2 \|\| =2:24.1.4-3 \|\| =2:24.1.5-1 \|\| =2:24.1.6-1 \|\| =2:24.1.8-1 \|\| =2:24.1.9-1	-
debian 13	xorg-server	>=0 <2:21.1.16-1	2:21.1.16-1
debian 14	xwayland	>=0 <2:24.1.6-1	2:24.1.6-1
debian 11	xorg-server	=2:1.20.11-1 \|\| =2:1.20.11-1+deb11u1 \|\| =2:1.20.11-1+deb11u10 \|\| =2:1.20.11-1+deb11u11 \|\| =2:1.20.11-1+deb11u12 \|\| =2:1.20.11-1+deb11u13 \|\| =2:1.20.11-1+deb11u14 \|\| =2:1.20.11-1+deb11u2 \|\| =2:1.20.11-1+deb11u3 \|\| =2:1.20.11-1+deb11u4 \|\| =2:1.20.11-1+deb11u5 \|\| =2:1.20.11-1+deb11u6 \|\| =2:1.20.11-1+deb11u7 \|\| =2:1.20.11-1+deb11u8 \|\| =2:1.20.11-1+deb11u9 \|\| >=0 <2:1.20.11-1+deb11u15	2:1.20.11-1+deb11u15
debian 12	xorg-server	=2:21.1.7-3 \|\| =2:21.1.7-3+deb12u1 \|\| =2:21.1.7-3+deb12u2 \|\| =2:21.1.7-3+deb12u3 \|\| =2:21.1.7-3+deb12u4 \|\| =2:21.1.7-3+deb12u5 \|\| =2:21.1.7-3+deb12u6 \|\| =2:21.1.7-3+deb12u7 \|\| =2:21.1.7-3+deb12u8 \|\| >=0 <2:21.1.7-3+deb12u9	2:21.1.7-3+deb12u9
debian 14	xorg-server	>=0 <2:21.1.16-1	2:21.1.16-1
debian 13	xwayland	>=0 <2:24.1.6-1	2:24.1.6-1
rpm rhel9	xorg-x11-server-Xwayland	<0:23.2.7-3.el9_6	0:23.2.7-3.el9_6
rpm rhel7	xorg-x11-server	-	-
rpm rhel10	xorg-x11-server-Xwayland	<0:24.1.5-3.el10_0	0:24.1.5-3.el10_0

1-10 of 18

Aliases

1. CVE-2025-266012. NVD-2025-266013. OSV-DEBIAN-2025-266014. OSV-2025-266015. SECURITY-TRACKER-CVE-2025-26601

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