CVE-2025-26601

Published: Feb 25, 2025

Modified: Apr 6, 2026

PUBLISHED

CVSS v3.1

7.8

HIGH

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.

Vendor	Product	Versions
Unknown	xserver	affected `0 - < 21.1.16` affected `22.0.0 - < 24.1.6`
Red Hat	Red Hat Enterprise Linux 10	unaffected `0:24.1.5-3.el10_0 - < *`
Red Hat	Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION	unaffected `0:1.1.0-25.el6_10 - < *`
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected `0:1.8.0-36.el7_9 - < *`
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected `0:1.20.4-30.el7_9 - < *`
Red Hat	Red Hat Enterprise Linux 8	unaffected `0:1.13.1-15.el8_10 - < *`
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support	unaffected `0:1.9.0-15.el8_2.13 - < *`
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected `0:1.11.0-8.el8_4.12 - < *`
Red Hat	Red Hat Enterprise Linux 8.4 Telecommunications Update Service	unaffected `0:1.11.0-8.el8_4.12 - < *`
Red Hat	Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions	unaffected `0:1.11.0-8.el8_4.12 - < *`
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected `0:1.12.0-6.el8_6.13 - < *`
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service	unaffected `0:1.12.0-6.el8_6.13 - < *`
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions	unaffected `0:1.12.0-6.el8_6.13 - < *`
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support	unaffected `0:1.12.0-15.el8_8.12 - < *`
Red Hat	Red Hat Enterprise Linux 9	unaffected `0:1.14.1-1.el9_5.1 - < *`
Red Hat	Red Hat Enterprise Linux 9	unaffected `0:1.20.11-28.el9_6 - < *`
Red Hat	Red Hat Enterprise Linux 9	unaffected `0:23.2.7-3.el9_6 - < *`
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions	unaffected `0:1.11.0-22.el9_0.13 - < *`
Red Hat	Red Hat Enterprise Linux 9.2 Extended Update Support	unaffected `0:1.12.0-14.el9_2.10 - < *`
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support	unaffected `0:1.13.1-8.el9_4.5 - < *`
Red Hat	Red Hat Enterprise Linux 6	All versions
Red Hat	Red Hat Enterprise Linux 8	All versions
Red Hat	Red Hat Enterprise Linux 8	All versions