Improper locking in Linux kernel amd amdgpu driver

1) Improper locking

EUVDB-ID: #VU90742

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47421

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the amdgpu_pci_error_detected() and amdgpu_pci_resume() functions in drivers/gpu/drm/amd/amdgpu/amdgpu_device.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:

External links

http://git.kernel.org/stable/c/72e9a1bf9b722628c28092e0c2cd8717edd201dc
http://git.kernel.org/stable/c/248b061689a40f4fed05252ee2c89f87cf26d7d8

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.