X.org X Server XWayland UAF before 21.1.25/24.1.14
CVE-2026-93516 Published on October 28, 2026
.Org Server XInput Passive Grab Use-After-Free
A use-after-free caused by lack of lifecycle management when adding / removing XInput master devices in X.org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X Clients to crash the X server or potentially execute code in X server context.
Vulnerability Analysis
CVE-2026-93516 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-93516 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-93516
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Affected Versions
x.org xorg-x11-server:- Before 21.1.25 is affected.
- Before 24.1.14 is affected.