CVE-2025-38668

Summary

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.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products we track (2)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/233d3c54c9620e95193923859ea1d0b0f5d748ca ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/233d3c54c9620e95193923859ea1d0b0f5d748caPatch
• https://git.kernel.org/stable/c/5d4261dbb3335221fd9c6e69f909ba79ee6663a7Patch
• https://git.kernel.org/stable/c/6c49eac796681e250e34156bafb643930310bd4aPatch
• https://git.kernel.org/stable/c/7574892e259bbb16262ebfb4b65a2054a5e03a49Patch
• https://git.kernel.org/stable/c/800a2cfb2df7f96b3fb48910fc595e0215f6b019Patch
• https://git.kernel.org/stable/c/ca46946a482238b0cdea459fb82fc837fb36260ePatch
• https://git.kernel.org/stable/c/ca9bef9ba1a6be640c87bf802d2e9e696021576aPatch
• https://git.kernel.org/stable/c/d7e59c5fd7a0f5e16e75a30a89ea2c4ab88612b8Patch