CVE-2026-46214

vsock/virtio: fix accept queue count leak on transport mismatch

State: Published
Severity: Not scored
Published: May 28, 2026
Updated: Oct 15, 2026
Reserved: May 13, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391fAffected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before fd51e810affa38d735d04261e673b2a5fe9c8665Affected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before f66c7904fb6f0e420a654bc90909e64a25d00896Affected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 65c484726e74013a2ec7ba67a34d87760ae8f390Affected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 29371f3cc83e2a92265b4768014a30b80234112fAffected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before e9edf9893cf26d060705c910a9b62d8cc96ed56aAffected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 6d3275fc4ed968938e1d556c344798046776668dAffected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 52bcb57a4e8a0865a76c587c2451906342ae1b2dAffected
LinuxLinux	5.5Affected before 5.5Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.140 through 6.6.Not affected 6.12.90 through 6.12.Not affected 6.18.32 through 6.18.Not affected 7.0.9 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391fAffected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before fd51e810affa38d735d04261e673b2a5fe9c8665Affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before f66c7904fb6f0e420a654bc90909e64a25d00896Affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 65c484726e74013a2ec7ba67a34d87760ae8f390Affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 29371f3cc83e2a92265b4768014a30b80234112fAffected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before e9edf9893cf26d060705c910a9b62d8cc96ed56aAffected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 6d3275fc4ed968938e1d556c344798046776668dAffected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a to before 52bcb57a4e8a0865a76c587c2451906342ae1b2dAffected

LinuxLinux

5.5Affected
before 5.5Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.140 through 6.6.*Not affected
6.12.90 through 6.12.*Not affected
6.18.32 through 6.18.*Not affected
7.0.9 through 7.0.*Not affected
7.1 and laterNot affected

References

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