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CVSS 9.9 · CRITICAL

CVE-2026-7374

A flaw was found in KubeVirt's virt-handler component. This vulnerability allows an authenticated OpenShift user with edit permissions in a single namespace to exploit improper symlink validation when connecting to virtual machine console sockets. By replacing the console socket with a symlink to the host's container runtime (CRI-O) socket, an attacker can hijack virt-handler's privileged connection. This enables the attacker to access any Unix socket on the host, potentially leading to full control of the node and the entire cluster.

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Analysis

KubeVirt (OpenShift Virtualization) contains a critical vulnerability (CVSS 9.9) allowing users with namespace edit permissions to gain full control of the host node and the entire cluster. By exploiting improper symlink validation during console socket connections, an attacker can hijack the host's container runtime socket to bypass isolation.

Severity

Score: 9.9(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
AV: NETWORK
AC: LOW
PR: LOW
UI: NONE
S: CHANGED
C: HIGH
I: HIGH
A: HIGH
Weakness (CWE): CWE-59

EPSS

Probability of exploitation (next 30 days): 0.0012 (0.1%)
Percentile: 30.2%
EPSS: 2026-05-27

Technical description

A flaw was found in KubeVirt's virt-handler component. This vulnerability allows an authenticated OpenShift user with edit permissions in a single namespace to exploit improper symlink validation when connecting to virtual machine console sockets. By replacing the console socket with a symlink to the host's container runtime (CRI-O) socket, an attacker can hijack virt-handler's privileged connection. This enables the attacker to access any Unix socket on the host, potentially leading to full control of the node and the entire cluster.

Published: 5/26/2026, 2:16:40 PM
Last modified: 5/28/2026, 3:16:44 AM

References

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