Vulnerability identifier: #VU90029

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-2021-47020

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 sdw_stream_add_slave() function in drivers/soundwire/stream.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/342260fe821047c3d515e3d28085d73fbdce3e80
http://git.kernel.org/stable/c/870533403ffa28ff63e173045fc5369365642002
http://git.kernel.org/stable/c/7c468deae306d0cbbd539408c26cfec04c66159a
http://git.kernel.org/stable/c/2f17ac005b320c85d686088cfd4c2e7017912b88
http://git.kernel.org/stable/c/effd2bd62b416f6629e18e3ce077c60de14cfdea
http://git.kernel.org/stable/c/48f17f96a81763c7c8bf5500460a359b9939359f

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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.