CVE-2026-46214 is a vulnerability in Linux Kernel
Published on May 28, 2026
vsock/virtio: fix accept queue count leak on transport mismatch
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.
Products Associated with CVE-2026-46214
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Affected Versions
Linux:- Version c0cfa2d8a788fcf45df5bf4070ab2474c88d543a and below 65c484726e74013a2ec7ba67a34d87760ae8f390 is affected.
- Version c0cfa2d8a788fcf45df5bf4070ab2474c88d543a and below 29371f3cc83e2a92265b4768014a30b80234112f is affected.
- Version c0cfa2d8a788fcf45df5bf4070ab2474c88d543a and below e9edf9893cf26d060705c910a9b62d8cc96ed56a is affected.
- Version c0cfa2d8a788fcf45df5bf4070ab2474c88d543a and below 6d3275fc4ed968938e1d556c344798046776668d is affected.
- Version c0cfa2d8a788fcf45df5bf4070ab2474c88d543a and below 52bcb57a4e8a0865a76c587c2451906342ae1b2d is affected.
- Version 5.5 is affected.
- Before 5.5 is unaffected.
- Version 6.6.140, <= 6.6.* is unaffected.
- Version 6.12.90, <= 6.12.* is unaffected.
- Version 6.18.32, <= 6.18.* is unaffected.
- Version 7.0.9, <= 7.0.* is unaffected.
- Version 7.1-rc1, <= * is unaffected.