CVE-2026-46214

Description

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix accept queue count leak on transport mismatch virtio_transport_recv_listen() calls sk_acceptq_added() before vsock_assign_transport(). If vsock_assign_transport() fails or selects a different transport, the error path returns without calling sk_acceptq_removed(), permanently incrementing sk_ack_backlog. After approximately backlog+1 such failures, sk_acceptq_is_full() returns true, causing the listener to reject all new connections. Fix by moving sk_acceptq_added() to after the transport validation, matching the pattern used by vmci_transport and hyperv_transport.

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EPSS — Exploit Prediction

0.0013

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f https://git.kernel.org/stable/c/2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390 https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a https://git.kernel.org/stable/c/f66c7904fb6f0e420a654bc90909e64a25d00896 https://git.kernel.org/stable/c/fd51e810affa38d735d04261e673b2a5fe9c8665

Frequently Asked Questions

What is CVE-2026-46214? +

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix accept queue count leak on transport mismatch virtio_transport_recv_listen() calls sk_acceptq_added() before vsock_assign_transport(). If vsock_assign_transport() fails or selects a different transport, the error path returns without calling sk_acceptq_removed(), permanently incrementing sk_ack_backlog. After approximately backlog+1 such failures, sk_acceptq_is_full() returns true, causing the listener to reject all new connections. Fix by moving sk_acceptq_added() to after the transport validation, matching the pattern used by vmci_transport and hyperv_transport.

How do I check if I'm vulnerable to CVE-2026-46214? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.