The MITRE CVE dictionary describes this issue as:
Integer overflow in the i915_gem_execbuffer2 function in drivers/gpu/drm/i915/i915_gem_execbuffer.c in the Direct Rendering Manager (DRM) subsystem in the Linux kernel before 3.3.5 on 32-bit platforms allows local users to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact via a crafted ioctl call.
Find out more about CVE-2012-2383 from the
MITRE CVE dictionary dictionary and
This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.