CVE-2017-12179: xorg-x11-server: Integer overflow and unvalidated length in (S)ProcXIBarrierReleasePointer

Severity: Critical

CVSS Score: 9.8

xorg-x11-server before 1.19.5 was vulnerable to integer overflow in (S)ProcXIBarrierReleasePointer functions allowing malicious X client to cause X server to crash or possibly execute arbitrary code.