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CVE-2021-20292

MEDIUMCVSS 6.7/10EPSS 0.87%

Last modified

CVE-2021-20292 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. 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. EPSS estimates a 0.87% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
6.7/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.87%

54.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel>= 3.3, < 4.9.298
LinuxLinux Kernel>= 4.10, < 4.14.263
LinuxLinux Kernel>= 4.15, < 4.19.140
LinuxLinux Kernel>= 4.20, < 5.4.59
LinuxLinux Kernel>= 5.5, < 5.7.16
LinuxLinux Kernel>= 5.8, < 5.8.2
FedoraprojectFedora33
RedhatEnterprise Linux6.0
RedhatEnterprise Linux7.0
DebianDebian Linux9.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-20292?
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.
How severe is CVE-2021-20292?
CVE-2021-20292 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.87% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20292?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20292?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST