CVE-2026-46214

A flaw was found in the Linux kernel's vsock/virtio component. This vulnerability occurs when virtio_transport_recv_listen() calls sk_acceptq_added() before transport validation, leading to a permanent increment of the sk_ack_backlog counter if transport assignment fails. A remote attacker could exploit this flaw by repeatedly triggering transport mismatches, causing the listener to reject all new connections and resulting in a Denial of Service (DoS).

This Moderate flaw in the Linux kernel's vsock/virtio component can lead to a denial of service. By repeatedly triggering transport mismatches during connection attempts, a remote attacker could exhaust the accept queue, causing the listener to reject all new connections in affected virtualized environments.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.