Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.3, < 5.4.297 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- 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
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
FAQ
What is CVE-2025-38668?
CVE-2025-38668 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 ...
How severe is CVE-2025-38668?
CVE-2025-38668 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38668?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.