Filipe Balestra

**Name of the Vulnerable Software and Affected Versions** X Window System X11R6.4 and earlier **Description** A buffer overflow issue exists in the Strcmp function within the XKEYBOARD extension. This allows local users to potentially gain privileges by exploiting a long ` XKB CHARSET` environment variable value. **Recommendations** For X Window System X11R6.4 and earlier, consider restricting access to the XKEYBOARD extension as a temporary workaround until a patch is available.