Improper error handling in Linux kernel mmc host driver

1) Improper error handling

EUVDB-ID: #VU90963

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-2021-46962

CWE-ID: CWE-388 - Error Handling

Exploit availability: No

Description

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

The vulnerability exists due to improper error handling within the uniphier_sd_remove() function in drivers/mmc/host/uniphier-sd.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/0d8941b9b2d3e7b3481fdf43b1a6189d162175b7
http://git.kernel.org/stable/c/25ac6ce65f1ab458982d15ec1caf441acd37106a
http://git.kernel.org/stable/c/ebe0f12cf4c044f812c6d17011531582f9ac8bb3
http://git.kernel.org/stable/c/d6e7fda496978f2763413b5523557b38dc2bf6c2
http://git.kernel.org/stable/c/e29c84857e2d51aa017ce04284b962742fb97d9e

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.