CVE-2026-46214 Details
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.
A vulnerability in the Linux kernel's vsock/virtio implementation can lead to a connection acceptance queue count leak when there is a transport mismatch. The issue arises in the 'virtio_transport_recv_listen()' function, which calls 'sk_acceptq_added()' before assigning the transport with 'vsock_assign_transport()'. If 'vsock_assign_transport()' fails or selects a different transport, the function exits without removing the acceptance queue increment, causing a permanent backlog increase. After several such failures, the acceptance queue becomes full, and the listener starts rejecting new connections. This vulnerability affects the Linux kernel stable tree.
The vulnerability has been fixed by moving the 'sk_acceptq_added()' call to after the transport validation, aligning it with the patterns used by 'vmci_transport' and 'hyperv_transport'. Users should update to the latest version of the Linux kernel stable tree where this fix has been applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f | kernel.org | Patch |
| https://git.kernel.org/stable/c/2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f | kernel.org | Patch |
| https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d | kernel.org | Patch |
| https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d | kernel.org | Patch |
| https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a | kernel.org | Patch |
| https://git.kernel.org/stable/c/f66c7904fb6f0e420a654bc90909e64a25d00896 | kernel.org | Patch |
| https://git.kernel.org/stable/c/fd51e810affa38d735d04261e673b2a5fe9c8665 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-Other | Weakness Not in a Standard CWE Category | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.5, < 5.10.258 >= 5.11, < 5.15.209 >= 5.16, < 6.1.175 >= 6.2, < 6.6.140 >= 6.7, < 6.12.90 >= 6.13, < 6.18.32 >= 6.19, < 7.0.9 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 10, 2026 | Initial Analysis | [email protected] |
| Jun 1, 2026 | CVE Modified | kernel.org |
| May 28, 2026 | New CVE Received | kernel.org |