CVE-2024-39492: mailbox: mtk-cmdq: Fix pm_runtime_get_sync() warning in mbox shutdown

Severity: high (CVSS 7.0 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: 2024-07-10 · updated 2026-06-17
Weakness: CWE-252

Description

In the Linux kernel, the following vulnerability has been resolved: mailbox: mtk-cmdq: Fix pm_runtime_get_sync() warning in mbox shutdown The return value of pm_runtime_get_sync() in cmdq_mbox_shutdown() will return 1 when pm runtime state is active, and we don't want to get the warning message in this case. So we change the return value < 0 for WARN_ON().

Affected products

Linux kernel: from 6.7 before 6.9.4 — fixed in 6.9.4

How to fix

Upgrade to a fixed version: Linux kernel 6.9.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/2d42a37a4518478f075ccf848242b4a50e313a46
https://git.kernel.org/stable/c/747a69a119c469121385543f21c2d08562968ccc
https://git.kernel.org/stable/c/2d42a37a4518478f075ccf848242b4a50e313a46
https://git.kernel.org/stable/c/747a69a119c469121385543f21c2d08562968ccc

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