7.2

CVE-2021-20292: debian debian_linux Use After Free

Modified
AliasesUBUNTU-CVE-2021-20292DEBIAN-CVE-2021-20292
Published 28-05-2021Last modified 03-08-2024

Vulnerability summary

CVE-2021-20292 is a high (CVSS 7.2) Use After Free vulnerability in debian debian_linux. EPSS estimates a 0.85% chance of exploitation in the next 30 days, higher than 58.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.2/10
010
High · v2.0 (NVD)
EPSS score
0.85%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 13
DLA-2689-1SUSE-SU-2022:1651-1SUSE-SU-2022:1668-1SUSE-SU-2022:1669-1SUSE-SU-2022:1676-1SUSE-SU-2022:1686-1

Timeline

  1. 28-05-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.85%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.85% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu41 products
  • linuxAll versions (No fix recorded) | < 4.4.0-222.255 | < 4.15.0-143.147 | < 5.4.0-48.52
  • linux-aws< 4.4.0-1102.107 | < 4.4.0-1138.152 | < 4.15.0-1102.109 | < 5.4.0-1025.25
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.3All versions (No fix recorded)
  • linux-aws-5.4< 5.4.0-1025.25~18.04.1
Debian2 products
Fedoraproject1 product
Linux1 product
  • linux_kernel≥ 3.3, < 4.9.298 | ≥ 4.10, < 4.14.263 | ≥ 4.15, < 4.19.140 | ≥ 4.20, < 5.4.59 | ≥ 5.5, < 5.7.16 | ≥ 5.8, < 5.8.2
Redhat1 product

5 vendors · 46 products

References

8 links