CVE-2026-7374
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Container Native Virtualization 4.12 | 1779375376 < * | unaffected |
| Red Hat | Red Hat Container Native Virtualization 4.13 | 1778999881 < * | unaffected |
| Red Hat | Red Hat Container Native Virtualization 4.14 | 1779321599 < * | unaffected |
| Red Hat | Red Hat Container Native Virtualization 4.15 | 1778859977 < * | unaffected |
| Red Hat | Red Hat Container Native Virtualization 4.16 | 1778861274 < * | unaffected |
| Red Hat | Red Hat Container Native Virtualization 4.17 | 1779174925 < * | unaffected |
| Red Hat | Red Hat Container Native Virtualization 4.18 | 1778887155 < * | unaffected |
| Red Hat | Red Hat Container Native Virtualization 4.19 | 1779289071 < * | unaffected |
| Red Hat | Red Hat Container Native Virtualization 4.20 | 1779288737 < * | unaffected |
| Red Hat | Red Hat Container Native Virtualization 4.21 | 1779420069 < * | unaffected |
Weaknesses
- CWE-59: Improper Link Resolution Before File Access ('Link Following')
Workarounds
Update cluster RBAC to not allow exec into virt-launcher pods.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
kubevirt: KubeVirt virt-handler: Privilege escalation and node compromise via symlink following vulnerability
Additional References
- https://access.redhat.com/security/cve/CVE-2026-7374
- https://bugzilla.redhat.com/show_bug.cgi?id=2463728
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7374.json
- https://access.redhat.com/errata/RHSA-2026:20825
- https://access.redhat.com/errata/RHSA-2026:20886
- https://access.redhat.com/errata/RHSA-2026:20890
- https://access.redhat.com/errata/RHSA-2026:20866
- https://access.redhat.com/errata/RHSA-2026:20975
- https://access.redhat.com/errata/RHSA-2026:20763
- https://access.redhat.com/errata/RHSA-2026:20736
- https://access.redhat.com/errata/RHSA-2026:20767
- https://access.redhat.com/errata/RHSA-2026:20782
- https://access.redhat.com/errata/RHSA-2026:20720
References
- https://access.redhat.com/errata/RHSA-2026:20720
- https://access.redhat.com/errata/RHSA-2026:20736
- https://access.redhat.com/errata/RHSA-2026:20763
- https://access.redhat.com/errata/RHSA-2026:20767
- https://access.redhat.com/errata/RHSA-2026:20782
- https://access.redhat.com/errata/RHSA-2026:20825
- https://access.redhat.com/errata/RHSA-2026:20866
- https://access.redhat.com/errata/RHSA-2026:20886
- https://access.redhat.com/errata/RHSA-2026:20890
- https://access.redhat.com/errata/RHSA-2026:20975
- https://access.redhat.com/security/cve/CVE-2026-7374
- https://bugzilla.redhat.com/show_bug.cgi?id=2463728
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