CVE-2021-20292
kernel: DRM Memory Management Double Free Privilege Escalation Vulnerability
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · August 13, 2020
Updated · June 28, 2026
Description
There is a flaw reported in drivers/gpu/drm/nouveau/nouveau_sgdma.c in nouveau_sgdma_create_ttm in Nouveau DRM subsystem. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker with a local account with a root privilege, can leverage this vulnerability to escalate privileges and execute code in the context of the kernel.
Statement
There was no shipped kernel version were seen affected with this problem, CONFIG_FAULT_INJECTION is disabled on all versions of RHEL.
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 3.1 · 6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE-416 · Use After Free