Memory leak in Linux kernel - CVE-2021-47020
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90029
CSH Severity: Low
CVSSv4.0: 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-2021-47020
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
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.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/342260fe821047c3d515e3d28085d73fbdce3e80
- https://git.kernel.org/stable/c/870533403ffa28ff63e173045fc5369365642002
- https://git.kernel.org/stable/c/7c468deae306d0cbbd539408c26cfec04c66159a
- https://git.kernel.org/stable/c/2f17ac005b320c85d686088cfd4c2e7017912b88
- https://git.kernel.org/stable/c/effd2bd62b416f6629e18e3ce077c60de14cfdea
- https://git.kernel.org/stable/c/48f17f96a81763c7c8bf5500460a359b9939359f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.191
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.37
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.119