In the Linux kernel, the following vulnerability has been resolved:
HID: roccat: free buffered reports when destroying device
roccat_report_event() duplicates each report with kmemdup() and stores
the allocation in a circular-buffer slot. The allocation is released only
when that slot is reused. The device destruction paths free struct roccat_device without releasing
reports still stored in cbuf[].
This makes those allocations unreachable
and leaks up to ROCCAT_CBUF_SIZE report buffers per device. Add a small destructor that frees every buffered report before freeing the
device, and use it in both paths that can destroy a registered device.
References 8
https://git.kernel.org/stable/c/943b8dc2c6044c01e36395f51bb809a4b6bdfd22
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/bbff0ccbff360a5498075525005f6a913239a3d7
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/da00eac19feef209c9591e48c860afc2014603be
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/fbb5a60f5c31b5625f0d89a79912fbcb2559289b
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4cb3ff31d237ad1f515455c497ef07d7172d912b
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/690da9177e64bcfda2f4c0b5b8465178e4a236d8
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b3cc411daa50b39ba5706492a80a5a0804d9c85f
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/cebb20b9a29cfc90bf56e54337333084f85a69dd
416baaa9-dc9f-4396-8d5f-8c081fb06d67