Vulnerability identifier: #VU89947

Vulnerability 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-2021-47237

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 mkiss_close() function in drivers/net/hamradio/mkiss.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5
http://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b
http://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3
http://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119
http://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d
http://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f
http://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd
http://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13

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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.