CVE-2026-80987

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxfce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 4890152a3069f5cb58cc24b08cfd5fe95e568fa1affected
LinuxLinuxfce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 668aa3238548584ca9772da9cf43ae8c2389bbf1affected
LinuxLinuxfce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 9b0fa8a9e1057614a533cc3f18b17f82aab028d8affected
LinuxLinuxfce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88affected
LinuxLinuxfce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < a7f22105a7df8c7fd74d0af27ace6fa94fe03d87affected
LinuxLinuxfce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 6b6bbc6c878d64eacc60877df49fce7b1b6a08d0affected
LinuxLinuxfce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 75a604e9f1cfdebda421062fdf42225ca32154cdaffected
LinuxLinuxfce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7affected
LinuxLinux3.9affected
LinuxLinux0 < 3.9unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References