X.Org X Window System (aka X11 and X) X11R5 and X.Org Server (aka xserver and xorg-server) before 1.16.3, when using SUN-DES-1 (Secure RPC) authentication credentials, does not check the return value of a malloc call, which allows remote attackers to cause a denial of service (NULL pointer dereference and server crash) via a crafted connection request.
| Software | From | Fixed in |
|---|---|---|
| x.org / x11 | 5.0 | 5.0.x |
| x.org / x_server | - | 1.16.2.x |