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.

References

• https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f
• 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