CVE-2026-80988

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

NTB: ntb_transport: Fail TX enqueue when the QP link is down

Commit f195a1a6fe41 ("ntb: Drop packets when qp link is down") meant to

make ntb_transport_tx_enqueue() drop packets submitted while the QP link

is down, but it only returns 0 without consuming the packet. Zero means

success by this function's contract, so ntb_netdev reports NETDEV_TX_OK

and forgets the skb: nothing queued it, nothing frees it, and it leaks,

one skb for every transmit racing a link-down.

Return -ENOLINK instead, restoring the contract that a non-zero return

leaves the buffer owned by the caller. With the preceding patch,

ntb_netdev frees the skb on non-retryable enqueue failures and returns

NETDEV_TX_OK, so a packet racing with link-down is dropped without leaking

or entering a busy retry loop.