PT-2021-8172 · Linux+3 · Linux Kernel+3
Anand K Mistry
·
Published
2021-11-03
·
Updated
2026-03-14
·
CVE-2021-47200
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a use-after-free error in the
drm gem ttm mmap() function. When the drm gem ttm mmap() function drops a reference to the gem object on success and the gem object's refcount equals 1, it can lead to a situation where the subsequent drm gem object get() call results in a use-after-free (UAF) error. This can potentially allow an attacker to elevate privileges in the system. The issue was foreseeable when reference dropping was added in a previous commit.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Use After Free
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Debian
Linux Kernel
Red Os
Suse