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CVE-2026-80988

UnknownEPSS 0.17%

Last modified

CVE-2026-80988 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.17%

6.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 3cfdc448e8bfa8a7eaa5af87f357330566124b78, < 76c9ccc0c6bebfc74c0e727eda67687f5103ab06; >= bfa051f650a7708183bd86901ca4645dcf88c486, < 96d792c65b9d5f7f9dd86a1004315db59e450c07; >= 4f4af6b8b7a23fa37decaf43b55403e6bfd8e219, < 45cc11035165918dd1f81796ea98f81ece20d361; >= f195a1a6fe416882984f8bd6c61afc1383171860, < e6cc541fab01099fd8efadfa4f13afdf118bf536; >= f195a1a6fe416882984f8bd6c61afc1383171860, < 5eca0d899a3be661a7e2caaaa7467a6fa15d756c; >= f195a1a6fe416882984f8bd6c61afc1383171860, < 894e136b432da75c0352c80299807a5c4b04f167; >= f195a1a6fe416882984f8bd6c61afc1383171860, < 89177732fe1653bbfef10cf5d99bf20cf57762c2; >= f195a1a6fe416882984f8bd6c61afc1383171860, < 873ce713fef5dde0939220f04f3484ec86a16fba; aa6d6ed213b62cbdb09ea32abbfa085dd987a0c9; a8986a61ebee0b54c5d648444fbae09bd1c6dcd2; 94491412a2afc8a5aea4c5b455aed86d3486f0b1; c2cd5d993f57f819d46fe62387d3cc34d8468e60; 449b1978d4e50b14b2a4de3a26d0b074593926a3; >= 5.10.195, < 5.10.270; >= 5.15.132, < 5.15.221; >= 6.1.53, < 6.1.188; >= 4.14.326, < 4.15; >= 4.19.295, < 4.20; >= 5.4.257, < 5.5; >= 6.4.16, < 6.5; >= 6.5.3, < 6.6
LinuxLinux6.6

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80988?
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.
How severe is CVE-2026-80988?
Severity scoring for CVE-2026-80988 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-80988?
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