Improper locking in Linux kernel drm vc4 driver

1) Improper locking

EUVDB-ID: #VU94451

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2022-48826

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 vc4_dsi_host_attach() and vc4_dsi_dev_remove() functions in drivers/gpu/drm/vc4/vc4_dsi.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

External links

http://git.kernel.org/stable/c/770d1ba9a8201ce9bee0946eb03746449b6f3b80
http://git.kernel.org/stable/c/dddd832f35096fbc5004e3a7e58fb4d2cefb8deb
http://git.kernel.org/stable/c/0a3d12ab5097b1d045e693412e6b366b7e82031b

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.