#VU91633 Memory leak in Linux kernel - CVE-2021-47234

Vulnerability identifier: #VU91633

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-47234

CWE-ID: CWE-401

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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

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External links
https://git.kernel.org/stable/c/9a17907946232d01aa2ec109da5f93b8d31dd425
https://git.kernel.org/stable/c/6472955af5e88b5489b6d78316082ad56ea3e489
https://git.kernel.org/stable/c/aaac9a1bd370338ce372669eb9a6059d16b929aa

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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.