CVE-2026-80987

NTB: ntb_transport: Reject oversized TX buffers

State: Published
Severity: 7.5 High
Published: Sep 11, 2026
Updated: Oct 19, 2026
Reserved: Aug 26, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 4890152a3069f5cb58cc24b08cfd5fe95e568fa1Affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 668aa3238548584ca9772da9cf43ae8c2389bbf1Affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 9b0fa8a9e1057614a533cc3f18b17f82aab028d8Affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88Affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before a7f22105a7df8c7fd74d0af27ace6fa94fe03d87Affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 6b6bbc6c878d64eacc60877df49fce7b1b6a08d0Affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 75a604e9f1cfdebda421062fdf42225ca32154cdAffected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7Affected
LinuxLinux	3.9Affected before 3.9Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.109 through 6.12.Not affected 6.18.50 through 6.18.Not affected 7.2.4 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 4890152a3069f5cb58cc24b08cfd5fe95e568fa1Affected
fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 668aa3238548584ca9772da9cf43ae8c2389bbf1Affected
fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 9b0fa8a9e1057614a533cc3f18b17f82aab028d8Affected
fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88Affected
fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before a7f22105a7df8c7fd74d0af27ace6fa94fe03d87Affected
fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 6b6bbc6c878d64eacc60877df49fce7b1b6a08d0Affected
fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before 75a604e9f1cfdebda421062fdf42225ca32154cdAffected
fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 to before a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7Affected

LinuxLinux

3.9Affected
before 3.9Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.109 through 6.12.*Not affected
6.18.50 through 6.18.*Not affected
7.2.4 through 7.2.*Not affected
7.3 and laterNot affected

References

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