CVE-2026-46214
vsock/virtio: fix accept queue count leak on transport mismatch
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.
INFO
Published Date :
May 28, 2026, 10:16 a.m.
Last Modified :
June 10, 2026, 7:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Linux kernel to the patched version.
- Apply the specific virtio transport fix.
- Ensure transport validation precedes queue logic.
- Rebuild and deploy the kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-46214.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-46214 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-46214
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-46214 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-46214 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 10, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.140 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.32 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.90 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.9 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f66c7904fb6f0e420a654bc90909e64a25d00896 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fd51e810affa38d735d04261e673b2a5fe9c8665 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 01, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f Added Reference https://git.kernel.org/stable/c/f66c7904fb6f0e420a654bc90909e64a25d00896 Added Reference https://git.kernel.org/stable/c/fd51e810affa38d735d04261e673b2a5fe9c8665 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f Added Reference https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d Added Reference https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390 Added Reference https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d Added Reference https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a