X.Org X Window Server LibX11 XKEYBOARD Extension Local Buffer Overflow Vulnerability

X.Org X Window Server LibX11 XKEYBOARD Extension Local Buffer Overflow Vulnerability

X.Org X Window Server libX11 library is prone to a local buffer-overflow vulnerability because it fails to properly validate the size of attacker-supplied data before copying it into a finite-sized buffer.

The issue allows local attackers to execute arbitrary machine code in the context of a user running an application that is dynamically linked against the library. Failed exploit attempts will likely crash the application, denying service to legitimate users.

X11R6 4.0 and prior versions are reported affected by this vulnerability.