CVE-2025-38668

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

State: Published
Severity: Not scored
Published: Aug 22, 2025
Updated: May 11, 2026
Reserved: Apr 16, 2025

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	d8ca7d184b33af7913c244900df77c6cad6a5590 to before 7574892e259bbb16262ebfb4b65a2054a5e03a49Affected d8ca7d184b33af7913c244900df77c6cad6a5590 to before 6c49eac796681e250e34156bafb643930310bd4aAffected d8ca7d184b33af7913c244900df77c6cad6a5590 to before ca9bef9ba1a6be640c87bf802d2e9e696021576aAffected d8ca7d184b33af7913c244900df77c6cad6a5590 to before 800a2cfb2df7f96b3fb48910fc595e0215f6b019Affected d8ca7d184b33af7913c244900df77c6cad6a5590 to before 233d3c54c9620e95193923859ea1d0b0f5d748caAffected d8ca7d184b33af7913c244900df77c6cad6a5590 to before 5d4261dbb3335221fd9c6e69f909ba79ee6663a7Affected d8ca7d184b33af7913c244900df77c6cad6a5590 to before d7e59c5fd7a0f5e16e75a30a89ea2c4ab88612b8Affected d8ca7d184b33af7913c244900df77c6cad6a5590 to before ca46946a482238b0cdea459fb82fc837fb36260eAffected
LinuxLinux	5.3Affected before 5.3Not affected 5.4.297 through 5.4.Not affected 5.10.241 through 5.10.Not affected 5.15.190 through 5.15.Not affected 6.1.148 through 6.1.Not affected 6.6.101 through 6.6.Not affected 6.12.41 through 6.12.Not affected 6.15.9 through 6.15.*Not affected 6.16 and laterNot affected

Product

Versions

LinuxLinux

d8ca7d184b33af7913c244900df77c6cad6a5590 to before 7574892e259bbb16262ebfb4b65a2054a5e03a49Affected
d8ca7d184b33af7913c244900df77c6cad6a5590 to before 6c49eac796681e250e34156bafb643930310bd4aAffected
d8ca7d184b33af7913c244900df77c6cad6a5590 to before ca9bef9ba1a6be640c87bf802d2e9e696021576aAffected
d8ca7d184b33af7913c244900df77c6cad6a5590 to before 800a2cfb2df7f96b3fb48910fc595e0215f6b019Affected
d8ca7d184b33af7913c244900df77c6cad6a5590 to before 233d3c54c9620e95193923859ea1d0b0f5d748caAffected
d8ca7d184b33af7913c244900df77c6cad6a5590 to before 5d4261dbb3335221fd9c6e69f909ba79ee6663a7Affected
d8ca7d184b33af7913c244900df77c6cad6a5590 to before d7e59c5fd7a0f5e16e75a30a89ea2c4ab88612b8Affected
d8ca7d184b33af7913c244900df77c6cad6a5590 to before ca46946a482238b0cdea459fb82fc837fb36260eAffected

LinuxLinux

5.3Affected
before 5.3Not affected
5.4.297 through 5.4.*Not affected
5.10.241 through 5.10.*Not affected
5.15.190 through 5.15.*Not affected
6.1.148 through 6.1.*Not affected
6.6.101 through 6.6.*Not affected
6.12.41 through 6.12.*Not affected
6.15.9 through 6.15.*Not affected
6.16 and laterNot affected

References

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