CVE-2021-20292
Medium
Description
There is a flaw reported in the Linux kernel in versions before 5.9 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.
SeverityMedium
CVSS6.7
Exploit probability—
Product
Linux Kernel
PublishedMay 28, 2021
First seenMay 28, 2021
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel4.9.298, 4.14.263, 4.19.140, 5.4.59, 5.7.16, 5.8.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.3 ≤ v < 4.9.298, 4.10 ≤ v < 4.14.263, 4.15 ≤ v < 4.19.140, 4.20 ≤ v < 5.4.59, 5.5 ≤ v < 5.7.16, 5.8 ≤ v < 5.8.2 | 4.9.298, 4.14.263, 4.19.140, 5.4.59, 5.7.16, 5.8.2 |
| fedoraproject fedora | 33 | — |
| redhat enterprise_linux | 6.0, 7.0 | — |
| debian debian_linux | 9.0 | — |
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