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Vulnerability · Published May 28, 2021 · Assigned by redhat

CVE-2021-20292

Medium 6.7

In plain English

A medium-severity use-after-free in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.7Medium
Exploit odds (30 days)0.9%top 41.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.7.17-1DEBIAN-CVE-2021-20292
Debian:13linux5.7.17-1DEBIAN-CVE-2021-20292
Debian:14linux5.7.17-1DEBIAN-CVE-2021-20292
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-20292
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-20292
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-20292

Affected products (as reported)

VendorProductVersions
n/a kernel Kernel 5.9

Weakness: CWE-416

References