CVE-2023-54259

A reference count underflow flaw was found in the Linux kernel's SoundWire bus driver. When pm_runtime_resume_and_get() returns an error (-EACCES), the code continues execution and calls pm_runtime_put() at the end, even though the usage count was never incremented. This causes a usage count underflow in the runtime power management subsystem.

This affects systems with SoundWire audio hardware. The underflow can cause power management state inconsistencies but typically does not crash the system. The issue occurs only in specific error scenarios during device power state transitions.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.