CVE-2026-80987NTB: ntb_transport: Reject oversized TX buffers
- 7.5HighCVSS base score
- 0.50%Exploitation in 30 daysEPSS · top 56% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Received | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.50% · top 56% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 – < 4890152a3069f5cb58cc24b08cfd5fe95e568fa1
- affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 – < 668aa3238548584ca9772da9cf43ae8c2389bbf1
- affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 – < 9b0fa8a9e1057614a533cc3f18b17f82aab028d8
- affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 – < b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88
- affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 – < a7f22105a7df8c7fd74d0af27ace6fa94fe03d87
- affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 – < 6b6bbc6c878d64eacc60877df49fce7b1b6a08d0
- affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 – < 75a604e9f1cfdebda421062fdf42225ca32154cd
- affected fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 – < a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7
- affected 3.9
- unaffected < 3.9
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/4890152a3069f5cb58cc24b08cfd5fe95e568fa1 (opens in a new tab)
- https://git.kernel.org/stable/c/668aa3238548584ca9772da9cf43ae8c2389bbf1 (opens in a new tab)
- https://git.kernel.org/stable/c/9b0fa8a9e1057614a533cc3f18b17f82aab028d8 (opens in a new tab)
- https://git.kernel.org/stable/c/b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88 (opens in a new tab)
- https://git.kernel.org/stable/c/a7f22105a7df8c7fd74d0af27ace6fa94fe03d87 (opens in a new tab)
- https://git.kernel.org/stable/c/6b6bbc6c878d64eacc60877df49fce7b1b6a08d0 (opens in a new tab)
- https://git.kernel.org/stable/c/75a604e9f1cfdebda421062fdf42225ca32154cd (opens in a new tab)
- https://git.kernel.org/stable/c/a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76310 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-80987)Record last updated .