CVE-2026-46214 (GCVE-0-2026-46214)
Vulnerability from cvelistv5
Published
2026-05-28 09:40
Modified
2026-06-14 18:03
Severity ?
Summary
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.
Impacted products
Vendor Product Version
Linux Linux Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
Version: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: fix accept queue count leak on transport mismatch\n\nvirtio_transport_recv_listen() calls sk_acceptq_added() before\nvsock_assign_transport(). If vsock_assign_transport() fails or\nselects a different transport, the error path returns without\ncalling sk_acceptq_removed(), permanently incrementing\nsk_ack_backlog.\n\nAfter approximately backlog+1 such failures, sk_acceptq_is_full()\nreturns true, causing the listener to reject all new connections.\n\nFix by moving sk_acceptq_added() to after the transport validation,\nmatching the pattern used by vmci_transport and hyperv_transport."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T18:03:15.809Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f"
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        {
          "url": "https://git.kernel.org/stable/c/fd51e810affa38d735d04261e673b2a5fe9c8665"
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          "url": "https://git.kernel.org/stable/c/f66c7904fb6f0e420a654bc90909e64a25d00896"
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        {
          "url": "https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390"
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          "url": "https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f"
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        },
        {
          "url": "https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d"
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      "title": "vsock/virtio: fix accept queue count leak on transport mismatch",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46214",
    "datePublished": "2026-05-28T09:40:31.245Z",
    "dateReserved": "2026-05-13T15:03:33.105Z",
    "dateUpdated": "2026-06-14T18:03:15.809Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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