CVE-2026-80988NTB: ntb_transport: Fail TX enqueue when the QP link is down
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3cfdc448e8bfa8a7eaa5af87f357330566124b78 before 76c9ccc0c6bebfc74c0e727eda67687f5103ab06; from bfa051f650a7708183bd86901ca4645dcf88c486 before 96d792c65b9d5f7f9dd86a1004315db59e450c07; from 4f4af6b8b7a23fa37decaf43b55403e6bfd8e219 before 45cc11035165918dd1f81796ea98f81ece20d361; from f195a1a6fe416882984f8bd6c61afc1383171860 before e6cc541fab01099fd8efadfa4f13afdf118bf536; from f195a1a6fe416882984f8bd6c61afc1383171860 before 5eca0d899a3be661a7e2caaaa7467a6fa15d756c; from f195a1a6fe416882984f8bd6c61afc1383171860 before 894e136b432da75c0352c80299807a5c4b04f167; from f195a1a6fe416882984f8bd6c61afc1383171860 before 89177732fe1653bbfef10cf5d99bf20cf57762c2; from f195a1a6fe416882984f8bd6c61afc1383171860 before 873ce713fef5dde0939220f04f3484ec86a16fba; and 13 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/76c9ccc0c6bebfc74c0e727eda67687f5103ab06
- https://git.kernel.org/stable/c/96d792c65b9d5f7f9dd86a1004315db59e450c07
- https://git.kernel.org/stable/c/45cc11035165918dd1f81796ea98f81ece20d361
- https://git.kernel.org/stable/c/e6cc541fab01099fd8efadfa4f13afdf118bf536
- https://git.kernel.org/stable/c/5eca0d899a3be661a7e2caaaa7467a6fa15d756c
- https://git.kernel.org/stable/c/894e136b432da75c0352c80299807a5c4b04f167
- https://git.kernel.org/stable/c/89177732fe1653bbfef10cf5d99bf20cf57762c2
- https://git.kernel.org/stable/c/873ce713fef5dde0939220f04f3484ec86a16fba
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.