CVE-2026-80988NTB: ntb_transport: Fail TX enqueue when the QP link is down
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% 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: Fail TX enqueue when the QP link is down Commit f195a1a6fe41 ("ntb: Drop packets when qp link is down") meant to make ntb_transport_tx_enqueue() drop packets submitted while the QP link is down, but it only returns 0 without consuming the packet. Zero means success by this function's contract, so ntb_netdev reports NETDEV_TX_OK and forgets the skb: nothing queued it, nothing frees it, and it leaks, one skb for every transmit racing a link-down. Return -ENOLINK instead, restoring the contract that a non-zero return leaves the buffer owned by the caller. With the preceding patch, ntb_netdev frees the skb on non-retryable enqueue failures and returns NETDEV_TX_OK, so a packet racing with link-down is dropped without leaking or entering a busy retry loop.
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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 3cfdc448e8bfa8a7eaa5af87f357330566124b78 – < 76c9ccc0c6bebfc74c0e727eda67687f5103ab06
- affected bfa051f650a7708183bd86901ca4645dcf88c486 – < 96d792c65b9d5f7f9dd86a1004315db59e450c07
- affected 4f4af6b8b7a23fa37decaf43b55403e6bfd8e219 – < 45cc11035165918dd1f81796ea98f81ece20d361
- affected f195a1a6fe416882984f8bd6c61afc1383171860 – < e6cc541fab01099fd8efadfa4f13afdf118bf536
- affected f195a1a6fe416882984f8bd6c61afc1383171860 – < 5eca0d899a3be661a7e2caaaa7467a6fa15d756c
- affected f195a1a6fe416882984f8bd6c61afc1383171860 – < 894e136b432da75c0352c80299807a5c4b04f167
- affected f195a1a6fe416882984f8bd6c61afc1383171860 – < 89177732fe1653bbfef10cf5d99bf20cf57762c2
- affected f195a1a6fe416882984f8bd6c61afc1383171860 – < 873ce713fef5dde0939220f04f3484ec86a16fba
- affected aa6d6ed213b62cbdb09ea32abbfa085dd987a0c9
- affected a8986a61ebee0b54c5d648444fbae09bd1c6dcd2
- affected 94491412a2afc8a5aea4c5b455aed86d3486f0b1
- affected c2cd5d993f57f819d46fe62387d3cc34d8468e60
- affected 449b1978d4e50b14b2a4de3a26d0b074593926a3
- affected 5.10.195 – < 5.10.270
- affected 5.15.132 – < 5.15.221
- affected 6.1.53 – < 6.1.188
- affected 4.14.326 – < 4.15
- affected 4.19.295 – < 4.20
- affected 5.4.257 – < 5.5
- affected 6.4.16 – < 6.5
- affected 6.5.3 – < 6.6
- affected 6.6
- unaffected < 6.6
- 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/76c9ccc0c6bebfc74c0e727eda67687f5103ab06 (opens in a new tab)
- https://git.kernel.org/stable/c/96d792c65b9d5f7f9dd86a1004315db59e450c07 (opens in a new tab)
- https://git.kernel.org/stable/c/45cc11035165918dd1f81796ea98f81ece20d361 (opens in a new tab)
- https://git.kernel.org/stable/c/e6cc541fab01099fd8efadfa4f13afdf118bf536 (opens in a new tab)
- https://git.kernel.org/stable/c/5eca0d899a3be661a7e2caaaa7467a6fa15d756c (opens in a new tab)
- https://git.kernel.org/stable/c/894e136b432da75c0352c80299807a5c4b04f167 (opens in a new tab)
- https://git.kernel.org/stable/c/89177732fe1653bbfef10cf5d99bf20cf57762c2 (opens in a new tab)
- https://git.kernel.org/stable/c/873ce713fef5dde0939220f04f3484ec86a16fba (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-2026-76311 (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-2026-80988)Record last updated .