CVE-2025-38668

regulator: core: fix NULL dereference on unbind due to stale coupling data

Description

In the Linux kernel, the following vulnerability has been resolved: regulator: core: fix NULL dereference on unbind due to stale coupling data Failing to reset coupling_desc.n_coupled after freeing coupled_rdevs can lead to NULL pointer dereference when regulators are accessed post-unbind. This can happen during runtime PM or other regulator operations that rely on coupling metadata. For example, on ridesx4, unbinding the 'reg-dummy' platform device triggers a panic in regulator_lock_recursive() due to stale coupling state. Ensure n_coupled is set to 0 to prevent access to invalid pointers.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/7574892e259bbb16262ebfb4b65a2054a5e03a49
https://git.kernel.org/stable/c/6c49eac796681e250e34156bafb643930310bd4a
https://git.kernel.org/stable/c/ca9bef9ba1a6be640c87bf802d2e9e696021576a
https://git.kernel.org/stable/c/800a2cfb2df7f96b3fb48910fc595e0215f6b019
https://git.kernel.org/stable/c/233d3c54c9620e95193923859ea1d0b0f5d748ca
https://git.kernel.org/stable/c/5d4261dbb3335221fd9c6e69f909ba79ee6663a7
https://git.kernel.org/stable/c/d7e59c5fd7a0f5e16e75a30a89ea2c4ab88612b8
https://git.kernel.org/stable/c/ca46946a482238b0cdea459fb82fc837fb36260e

Frequently Asked Questions

What is the severity of CVE-2025-38668?: CVE-2025-38668 has not yet been assigned a CVSS score.
How to fix CVE-2025-38668?: To fix CVE-2025-38668, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-38668 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-38668 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-38668?: CVE-2025-38668 affects Linux Linux, Linux Linux.

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