CVE-2025-40162: ASoC: amd/sdw_utils: avoid NULL deref when devm_kasprintf() fails

Severity: unknown
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: 2025-11-12 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: amd/sdw_utils: avoid NULL deref when devm_kasprintf() fails devm_kasprintf() may return NULL on memory allocation failure, but the debug message prints cpus->dai_name before checking it. Move the dev_dbg() call after the NULL check to prevent potential NULL pointer dereference.

Affected products

Linux kernel: 6.12 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/095d692e5997ece300c89f10d903d5230090e6a0
https://git.kernel.org/stable/c/5726b68473f7153a7f6294185e5998b7e2a230a2
https://git.kernel.org/stable/c/a1cccbd19676fc36854535a7118ba2c27d0b84b3

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