openSUSE Leap 15.3: 2021:4136-1 Important xorg-x11-server Memory Exploit

This update for xorg-x11-server fixes the following issues:

- CVE-2021-4009: The handler for the CreatePointerBarrier request of the

XFixes extension does not properly validate the request length leading

to out of bounds memory write. (bsc#1190487)

- CVE-2021-4010: The handler for the Suspend request of the Screen Saver

extension does not properly validate the request length leading to out

of bounds memory write. (bsc#1190488)

- CVE-2021-4011: The handlers for the RecordCreateContext and

RecordRegisterClients requests of the Record extension do not properly

validate the request length leading to out of bounds memory write.

(bsc#1190489)