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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd8ca7d184b33af7913c244900df77c6cad6a5590 < 7574892e259bbb16262ebfb4b65a2054a5e03a49affected
LinuxLinuxd8ca7d184b33af7913c244900df77c6cad6a5590 < 6c49eac796681e250e34156bafb643930310bd4aaffected
LinuxLinuxd8ca7d184b33af7913c244900df77c6cad6a5590 < ca9bef9ba1a6be640c87bf802d2e9e696021576aaffected
LinuxLinuxd8ca7d184b33af7913c244900df77c6cad6a5590 < 800a2cfb2df7f96b3fb48910fc595e0215f6b019affected
LinuxLinuxd8ca7d184b33af7913c244900df77c6cad6a5590 < 233d3c54c9620e95193923859ea1d0b0f5d748caaffected
LinuxLinuxd8ca7d184b33af7913c244900df77c6cad6a5590 < 5d4261dbb3335221fd9c6e69f909ba79ee6663a7affected
LinuxLinuxd8ca7d184b33af7913c244900df77c6cad6a5590 < d7e59c5fd7a0f5e16e75a30a89ea2c4ab88612b8affected
LinuxLinuxd8ca7d184b33af7913c244900df77c6cad6a5590 < ca46946a482238b0cdea459fb82fc837fb36260eaffected
LinuxLinux5.3affected
LinuxLinux0 < 5.3unaffected
LinuxLinux5.4.297 <= 5.4.*unaffected
LinuxLinux5.10.241 <= 5.10.*unaffected
LinuxLinux5.15.190 <= 5.15.*unaffected
LinuxLinux6.1.148 <= 6.1.*unaffected
LinuxLinux6.6.101 <= 6.6.*unaffected
LinuxLinux6.12.41 <= 6.12.*unaffected
LinuxLinux6.15.9 <= 6.15.*unaffected
LinuxLinux6.16 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

References