---
id: CVE-2026-46214
title: |-
  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()
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_assig…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.5, < 5.10.258'
  - 'linux_kernel >= 5.11, < 5.15.209'
  - 'linux_kernel >= 5.16, < 6.1.175'
  - 'linux_kernel >= 6.2, < 6.6.140'
  - 'linux_kernel >= 6.7, < 6.12.90'
  - 'linux_kernel >= 6.13, < 6.18.32'
  - 'linux_kernel >= 6.19, < 7.0.9'
patched:
  - linux_kernel 7.0.9
published: '2026-05-28'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:50.403'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46214'
references:
  - url: 'https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f66c7904fb6f0e420a654bc90909e64a25d00896'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fd51e810affa38d735d04261e673b2a5fe9c8665'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00162
epssPercentile: 0.05013
ingestedAt: '2026-10-15T03:30:12.896Z'
---

## Overview

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.

## Affected

- `linux_kernel >= 5.5, < 5.10.258`
- `linux_kernel >= 5.11, < 5.15.209`
- `linux_kernel >= 5.16, < 6.1.175`
- `linux_kernel >= 6.2, < 6.6.140`
- `linux_kernel >= 6.7, < 6.12.90`
- `linux_kernel >= 6.13, < 6.18.32`
- `linux_kernel >= 6.19, < 7.0.9`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.9`