CVE-2024-26825

In the Linux kernel, the following vulnerability has been resolved:

nfc: nci: free rxdatareassembly skb on NCI device cleanup

rxdatareassembly skb is stored during NCI data exchange for processing fragmented packets. It is dropped only when the last fragment is processed or when an NTF packet with NCIOPRFDEACTIVATENTF opcode is received. However, the NCI device may be deallocated before that which leads to skb leak.

As by design the rxdatareassembly skb is bound to the NCI device and nothing prevents the device to be freed before the skb is processed in some way and cleaned, free it on the NCI device cleanup.

Found by Linux Verification Center (linuxtesting.org) with Syzkaller.