CVE-2018-20669
kernel: missing access_ok() checks in i915_gem_execbuffer2_ioctl() results in priviledge escalation
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · January 4, 2019
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel where a provided address with access_ok() is not checked before accessing userspace data in certain situations. Lack of such checks in i915_gem_execbuffer2_ioctl in drivers/gpu/drm/i915/i915_gem_execbuffer.c may allow a local unprivileged attacker to possible escalate its privileges.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 7.8CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-822 · Untrusted Pointer Dereference