CVE-2026-80987
Published: September 15, 2026Last modified: September 15, 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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.182-r0) |
| 25 LTS | linux-lts | Vulnerable (6.12.103-r0) | |
| Stream | linux-lts | Vulnerable (6.18.46-r0) |
References
- https://git.kernel.org/stable/c/4890152a3069f5cb58cc24b08cfd5fe95e568fa1
- https://git.kernel.org/stable/c/668aa3238548584ca9772da9cf43ae8c2389bbf1
- https://git.kernel.org/stable/c/6b6bbc6c878d64eacc60877df49fce7b1b6a08d0
- https://git.kernel.org/stable/c/75a604e9f1cfdebda421062fdf42225ca32154cd
- https://git.kernel.org/stable/c/9b0fa8a9e1057614a533cc3f18b17f82aab028d8
- https://git.kernel.org/stable/c/a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7
- https://git.kernel.org/stable/c/a7f22105a7df8c7fd74d0af27ace6fa94fe03d87
- https://git.kernel.org/stable/c/b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88