SB2026052970 - Improper control of a resource through its lifetime in Linux kernel vmw_vsock

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-46214)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• 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