Memory leak in Linux kernel phy mediatek driver

1) Memory leak

EUVDB-ID: #VU91633

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-2021-47234

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak within the mtk_phy_init() function in drivers/phy/mediatek/phy-mtk-tphy.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/9a17907946232d01aa2ec109da5f93b8d31dd425
http://git.kernel.org/stable/c/6472955af5e88b5489b6d78316082ad56ea3e489
http://git.kernel.org/stable/c/aaac9a1bd370338ce372669eb9a6059d16b929aa

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.