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CVE-2026-80987

HIGHCVSS 7.5/10EPSS 0.45%

Last modified

CVE-2026-80987 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.45%

37.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90, < 4890152a3069f5cb58cc24b08cfd5fe95e568fa1; >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90, < 668aa3238548584ca9772da9cf43ae8c2389bbf1; >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90, < 9b0fa8a9e1057614a533cc3f18b17f82aab028d8; >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90, < b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88; >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90, < a7f22105a7df8c7fd74d0af27ace6fa94fe03d87; >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90, < 6b6bbc6c878d64eacc60877df49fce7b1b6a08d0; >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90, < 75a604e9f1cfdebda421062fdf42225ca32154cd; >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90, < a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7
LinuxLinux3.9

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80987?
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.
How severe is CVE-2026-80987?
CVE-2026-80987 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2026-80987?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST