Skip to content
Fencer Vulns
medium 6.7

CVE-2021-20292 json

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…

published 2021-05-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7718

cvss
6.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux linux_kernel 4.9.298, 4.14.263, 4.19.140, 5.4.59, 5.7.16, 5.8.2
  • linux Debian 14, Debian 13, Debian 12 5.7.17-1

debian advisories DEBIAN-CVE-2021-20292

  • linux Ubuntu 18.04 LTS 4.15.0-143.147
  • linux Ubuntu 20.04 LTS 5.4.0-48.52
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1102.109
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1025.25
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1025.25
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1091.93
  • linux-kvm Ubuntu 20.04 LTS 5.4.0-1024.24
  • linux-azure Ubuntu 20.04 LTS 5.4.0-1026.26

ubuntu advisories UBUNTU-CVE-2021-20292

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-syms SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +3 more 4.12.14-150100.197.114.2
  • kernel-source SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +3 more 4.12.14-150100.197.114.2
  • kernel-default SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +7 more 4.12.14-150100.197.114.2
  • kernel-vanilla openSUSE Leap 15.4, openSUSE Leap 15.3 4.12.14-150100.197.114.2
  • kernel-kvmsmall openSUSE Leap 15.4, openSUSE Leap 15.3 4.12.14-150100.197.114.2
  • kernel-zfcpdump SLES 15 SP1-LTSS, openSUSE Leap 15.4, openSUSE Leap 15.3 4.12.14-150100.197.114.2
  • kernel-obs-build SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +3 more 4.12.14-150100.197.114.2
  • kernel-syms SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150000.150.92.2

suse advisories SUSE-SU-2022:2111-1SUSE-SU-2022:2103-1SUSE-SU-2022:2083-1SUSE-SU-2022:2082-1SUSE-SU-2022:2077-1SUSE-SU-2022:1687-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-20292 updated cvss 6.7

kernel: DRM Memory Management Double Free Privilege Escalation Vulnerability

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • n/a kernel

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.