Is CVE-2021-20292 in the CISA KEV catalog?

No. CVE-2021-20292 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-20292?

CVE-2021-20292 has a CVSS v3 base score of 6.7 (MEDIUM).

What is the EPSS score for CVE-2021-20292?

CVE-2021-20292 has an EPSS score of 0.87% (54th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-20292?

Upgrade linux on debian 11 to 5.7.17-1 or later. Fixes are available for 56 affected products.

CVE & CISA-KEV Catalog

CVE-2021-20292

MEDIUM

6.7

CVSS v3

NVD

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.

CWE-416Use After Free

How to fix

Remediation Available

linuxDebian

Fixed in:5.7.17-1CVE-2021-20292

linuxUbuntu

Fixed in:4.4.0-222.255USN-5343-1

Fixed in:4.15.0-143.147USN-4946-1

linux-awsUbuntu

Fixed in:4.4.0-1102.107USN-5343-1

Fixed in:4.4.0-1138.152USN-5343-1

Fixed in:4.15.0-1102.109USN-4946-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1102.109~16.04.1USN-4946-1

linux-azureUbuntu

Fixed in:4.15.0-1114.127~14.04.1USN-4946-1

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1114.127USN-4946-1

linux-dell300xUbuntu

Fixed in:4.15.0-1018.22USN-4946-1

linux-gcpUbuntu

Fixed in:4.15.0-1099.112~16.04.1USN-4946-1

linux-gcp-4.15Ubuntu

Fixed in:4.15.0-1099.112USN-4946-1

linux-hweUbuntu

Fixed in:4.15.0-143.147~16.04.3USN-4946-1

linux-image-4.15.0-1018-dell300xUbuntu

Fixed in:4.15.0-1018.22USN-4946-1

linux-image-4.15.0-1071-oracleUbuntu

Fixed in:4.15.0-1071.79~16.04.1USN-4946-1

Fixed in:4.15.0-1071.79USN-4946-1

linux-image-4.15.0-1085-raspi2Ubuntu

Fixed in:4.15.0-1085.90USN-4946-1

linux-image-4.15.0-1091-kvmUbuntu

Fixed in:4.15.0-1091.93USN-4946-1

linux-image-4.15.0-1099-gcpUbuntu

Fixed in:4.15.0-1099.112~16.04.1USN-4946-1

Fixed in:4.15.0-1099.112USN-4946-1

linux-image-4.15.0-1102-awsUbuntu

Fixed in:4.15.0-1102.109~16.04.1USN-4946-1

Fixed in:4.15.0-1102.109USN-4946-1

linux-image-4.15.0-1102-snapdragonUbuntu

Fixed in:4.15.0-1102.111USN-4946-1

linux-image-4.15.0-1114-azureUbuntu

Fixed in:4.15.0-1114.127~14.04.1USN-4946-1

Fixed in:4.15.0-1114.127USN-4946-1

linux-image-4.15.0-143-genericUbuntu

Fixed in:4.15.0-143.147~16.04.3USN-4946-1

Fixed in:4.15.0-143.147USN-4946-1

linux-image-4.15.0-143-generic-lpaeUbuntu

Fixed in:4.15.0-143.147USN-4946-1

linux-image-4.15.0-143-lowlatencyUbuntu

Fixed in:4.15.0-143.147~16.04.3USN-4946-1

Fixed in:4.15.0-143.147USN-4946-1

linux-image-4.4.0-1102-awsUbuntu

Fixed in:4.4.0-1102.107USN-5343-1

linux-image-4.4.0-1103-kvmUbuntu

Fixed in:4.4.0-1103.112USN-5343-1

linux-image-4.4.0-1138-awsUbuntu

Fixed in:4.4.0-1138.152USN-5343-1

linux-image-4.4.0-222-genericUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-4.4.0-222-lowlatencyUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-awsUbuntu

Fixed in:4.4.0.1102.100USN-5343-1

Fixed in:4.4.0.1138.143USN-5343-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1102.93USN-4946-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1102.105USN-4946-1

linux-image-azureUbuntu

Fixed in:4.15.0.1114.87USN-4946-1

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1114.87USN-4946-1

linux-image-dell300xUbuntu

Fixed in:4.15.0.1018.20USN-4946-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1099.100USN-4946-1

linux-image-gcp-lts-18.04Ubuntu

Fixed in:4.15.0.1099.117USN-4946-1

linux-image-genericUbuntu

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.15.0.143.130USN-4946-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.143.139USN-4946-1

linux-image-generic-lpaeUbuntu

Fixed in:4.15.0.143.130USN-4946-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1099.100USN-4946-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1103.101USN-5343-1

Fixed in:4.15.0.1091.87USN-4946-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.15.0.143.130USN-4946-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.143.139USN-4946-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

linux-image-oemUbuntu

Fixed in:4.15.0.143.139USN-4946-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1071.59USN-4946-1

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1071.81USN-4946-1

linux-image-raspi2Ubuntu

Fixed in:4.15.0.1085.82USN-4946-1

linux-image-snapdragonUbuntu

Fixed in:4.15.0.1102.105USN-4946-1

linux-image-virtualUbuntu

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.15.0.143.130USN-4946-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.143.139USN-4946-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

linux-kvmUbuntu

Fixed in:4.4.0-1103.112USN-5343-1

Fixed in:4.15.0-1091.93USN-4946-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

linux-oracleUbuntu

Fixed in:4.15.0-1071.79~16.04.1USN-4946-1

Fixed in:4.15.0-1071.79USN-4946-1

linux-raspi2Ubuntu

Fixed in:4.15.0-1085.90USN-4946-1

linux-snapdragonUbuntu

Fixed in:4.15.0-1102.111USN-4946-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.87%probability of exploitation in 30 days

54thpercentile

Moderate risk: more likely to be exploited than 54% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Third-Party Advisory1

lists.debian.org

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.