7.2

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.

Data is provided by the National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.3 < 4.9.298
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.263
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.140
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.59
Linux ≫ Linux Kernel Version >= 5.5 < 5.7.16
Linux ≫ Linux Kernel Version >= 5.8 < 5.8.2
Fedoraproject ≫ Fedora Version33
Redhat ≫ Enterprise Linux Version6.0
Redhat ≫ Enterprise Linux Version7.0
Debian ≫ Debian Linux Version9.0
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.02% 0.031
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 6.7 0.8 5.9
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 7.2 3.9 10
AV:L/AC:L/Au:N/C:C/I:C/A:C
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://bugzilla.redhat.com/show_bug.cgi?id=1939686
Patch
Third Party Advisory
Issue Tracking