CVE-2021-47020: soundwire: stream: fix memory leak in stream config error path

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-29 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: soundwire: stream: fix memory leak in stream config error path When stream config is failed, master runtime will release all slave runtime in the slave_rt_list, but slave runtime is not added to the list at this time. This patch frees slave runtime in the config error path to fix the memory leak.

Affected products

Linux kernel: from 4.18 before 4.19.191; from 4.20 before 5.4.119; from 5.5 before 5.10.37; from 5.11 before 5.11.21; from 5.12 before 5.12.4 — fixed in 4.19.191, 5.10.37, 5.11.21, 5.12.4, 5.4.119

How to fix

Upgrade to a fixed version: Linux kernel 4.19.191, 5.10.37, 5.11.21, 5.12.4. Check the vendor advisory for mitigations.

References

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