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.
How to fix
- linux linux_kernel5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9 or later
- git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f
- git.kernel.org/stable/c/2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f
- git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d
- git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390
- git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d
- git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a
- git.kernel.org/stable/c/f66c7904fb6f0e420a654bc90909e64a25d00896
- git.kernel.org/stable/c/fd51e810affa38d735d04261e673b2a5fe9c8665
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.5 ≤ v < 5.10.258, 5.11 ≤ v < 5.15.209, 5.16 ≤ v < 6.1.175, 6.2 ≤ v < 6.6.140, 6.7 ≤ v < 6.12.90, 6.13 ≤ v < 6.18.32, 6.19 ≤ v < 7.0.9 | 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9 |
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