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CVE-2026-80987

7.5 · HIGH

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 NUL…

Published Sep 11, 2026EPSS 0.50%

Overview

CVE-2026-80987 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/4890152a3069f5cb58cc24b08cfd5fe95e568fa1Refgit.kernel.org/stable/c/668aa3238548584ca9772da9cf43ae8c2389bbf1Refgit.kernel.org/stable/c/6b6bbc6c878d64eacc60877df49fce7b1b6a08d0Refgit.kernel.org/stable/c/75a604e9f1cfdebda421062fdf42225ca32154cdRefgit.kernel.org/stable/c/9b0fa8a9e1057614a533cc3f18b17f82aab028d8Refgit.kernel.org/stable/c/a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7Refgit.kernel.org/stable/c/a7f22105a7df8c7fd74d0af27ace6fa94fe03d87Refgit.kernel.org/stable/c/b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80987?

CVE-2026-80987 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-80987?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-80987?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-80987?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80987 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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