Linux vulnerability

What happened

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.

Affected versions

Linux: fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 through before a7f22105a7df8c7fd74d0af27ace6fa94fe03d87 (git); fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 through before 6b6bbc6c878d64eacc60877df49fce7b1b6a08d0 (git); fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 through before 75a604e9f1cfdebda421062fdf42225ca32154cd (git); fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 through before a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7 (git); 3.9 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.