In the Linux kernel, the following vulnerability has been resolved:
NTB: ntb_transport: Reject oversized TX buffers
ntb_process_tx() handles an oversized buffer by calling tx_handler()
with a NULL data pointer and returning success. ntb_netdev therefore
neither frees the skb in its completion callback nor takes its enqueue
error path, leaking it.
Reject oversized buffers in ntb_transport_tx_enqueue() before acquiring
a queue entry and return -EMSGSIZE. The caller retains ownership of the
buffer, and the preceding netdev patch frees the skb when enqueue
returns this permanent error.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 8
https://git.kernel.org/stable/c/6b6bbc6c878d64eacc60877df49fce7b1b6a08d0
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/75a604e9f1cfdebda421062fdf42225ca32154cd
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a7f22105a7df8c7fd74d0af27ace6fa94fe03d87
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4890152a3069f5cb58cc24b08cfd5fe95e568fa1
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/668aa3238548584ca9772da9cf43ae8c2389bbf1
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9b0fa8a9e1057614a533cc3f18b17f82aab028d8
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88
416baaa9-dc9f-4396-8d5f-8c081fb06d67