CVE-2025-26596 | Red Hat Enterprise Linux 6/7/8/9 X.org X11 Server/TigerVNC XkbSizeKeySyms heap-based overflow

A vulnerability was found in Red Hat Enterprise Linux 6/7/8/9 and classified as critical. Affected by this issue is the function XkbSizeKeySyms of the component X.org X11 Server/TigerVNC. The manipulation leads to heap-based buffer overflow.

This vulnerability is handled as CVE-2025-26596. An attack has to be approached locally. There is no exploit available.