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High severity7.8NVD Advisory· Published Feb 25, 2025· Updated Apr 6, 2026

CVE-2025-26601

CVE-2025-26601

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.

Affected products

6
  • Tigervnc/Tigervnc
    cpe:2.3:a:tigervnc:tigervnc:-:*:*:*:*:*:*:*
  • Xorg/Xserver
    cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
    Range: <21.1.16
  • Xorg/Xwayland
    cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:*
    Range: <24.1.6
  • Red Hat/Enterprise Linux3 versions
    cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

19

News mentions

0

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