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.
Product status
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a (git) before 2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a (git) before fd51e810affa38d735d04261e673b2a5fe9c8665
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a (git) before f66c7904fb6f0e420a654bc90909e64a25d00896
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a (git) before 65c484726e74013a2ec7ba67a34d87760ae8f390
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a (git) before 29371f3cc83e2a92265b4768014a30b80234112f
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a (git) before e9edf9893cf26d060705c910a9b62d8cc96ed56a
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a (git) before 6d3275fc4ed968938e1d556c344798046776668d
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a (git) before 52bcb57a4e8a0865a76c587c2451906342ae1b2d
5.5
Any version before 5.5
5.10.258 (semver)
5.15.209 (semver)
6.1.175 (semver)
6.6.140 (semver)
6.12.90 (semver)
6.18.32 (semver)
7.0.9 (semver)
7.1-rc1 (original_commit_for_fix)
References
git.kernel.org/...c/2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f
git.kernel.org/...c/fd51e810affa38d735d04261e673b2a5fe9c8665
git.kernel.org/...c/f66c7904fb6f0e420a654bc90909e64a25d00896
git.kernel.org/...c/65c484726e74013a2ec7ba67a34d87760ae8f390
git.kernel.org/...c/29371f3cc83e2a92265b4768014a30b80234112f
git.kernel.org/...c/e9edf9893cf26d060705c910a9b62d8cc96ed56a
git.kernel.org/...c/6d3275fc4ed968938e1d556c344798046776668d
git.kernel.org/...c/52bcb57a4e8a0865a76c587c2451906342ae1b2d