Improper control of a resource through its lifetime in Linux kernel - CVE-2026-46214
Published: May 29, 2026
Vulnerability identifier: #VU132970
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-46214
CWE-ID: CWE-664
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper state management in virtio_transport_recv_listen() when handling connection attempts with a transport mismatch. A remote attacker can trigger repeated transport mismatch failures to cause a denial of service.
After enough such failures, the listener rejects all new connections because the accept queue backlog count remains permanently incremented.
How to mitigate CVE-2026-46214
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f
- https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d
- https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390
- https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d
- https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a