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.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- RedHat / enterprise_linux7.0 – 7.0
- RedHat / enterprise_linux8.0 – 8.0
- RedHat / enterprise_linux9.0 – 9.0
- TigerVNC / TigerVNC
- X.Org / X server21.1.16
- X.Org / xwayland24.1.6
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2500
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2502
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2861
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2862
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2865
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2866
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2873
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2874
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2875
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2879
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2880
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:3976
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:7163
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:7165
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:7458
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2025-26601
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2345251
Updated 31m ago · 8 sources