What happened
In the Linux kernel, the following vulnerability has been resolved: i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode() i3c_device_get_supported_xfer_mode() uses dev->desc to obtain the master controller. However, dev->desc must not be dereferenced unless bus->lock is held, and this function does not take that lock. The function only needs access to the master controller associated with the device's bus. Use dev->bus instead, which is always valid for the lifetime of the device and does not require dereferencing dev->desc.
Affected versions
Linux: 256a21743d911f94ce92fe28f793cd586f3860b2 through before 251db58324ea4792c3f9f692ab09be148e051969 (git); 256a21743d911f94ce92fe28f793cd586f3860b2 through before 8bed7f4fa710914b7f05fd59998316bfb4d43385 (git); 6.19 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.