regulator: core: fix NULL dereference on unbind due to stale coupling data
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 95% of all CVEs
observed exploitation
nono source reports it
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 products
Linux · LinuxReferences
https://git.kernel.org/stable/c/233d3c54c9620e95193923859ea1d0b0f5d748cahttps://git.kernel.org/stable/c/5d4261dbb3335221fd9c6e69f909ba79ee6663a7https://git.kernel.org/stable/c/6c49eac796681e250e34156bafb643930310bd4ahttps://git.kernel.org/stable/c/7574892e259bbb16262ebfb4b65a2054a5e03a49https://git.kernel.org/stable/c/800a2cfb2df7f96b3fb48910fc595e0215f6b019https://git.kernel.org/stable/c/ca46946a482238b0cdea459fb82fc837fb36260ehttps://git.kernel.org/stable/c/ca9bef9ba1a6be640c87bf802d2e9e696021576ahttps://git.kernel.org/stable/c/d7e59c5fd7a0f5e16e75a30a89ea2c4ab88612b8https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlhttps://lists.debian.org/debian-lts-announce/2025/10/msg00008.html