CVE-2026-7374
Kubevirt: kubevirt virt-handler: privilege escalation and node compromise via symlink following vulnerability
CRITICAL 9.9
At a glance
- Source
- NVD
- EPSS
- EPSS 0.74 % · percentile 55 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Awaiting Analysis
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.
Weaknesses (CWE)
- CWE-59 — Improper Link Resolution Before File Access
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
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7374.json
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | redhat |
| CVSS 3.1 | CRITICAL 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | redhat-SADP |
| CVSS 3.1 | CRITICAL 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | CRITICAL 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Advisories
- GHSA-7jcp-v9w4-wjmg — KubeVirt has a Link Following vulnerability
- GO-2026-5848 — KubeVirt has a Link Following vulnerability in kubevirt.io/kubevirt
European references
- ENISA EUVD · EUVD-2026-31824
- GCVE · GCVE-0-2026-7374
CERT-FR advisories
- CERTFR-2026-AVI-0685 — Multiples vulnérabilités dans Microsoft Azure Linux · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| kubevirt | affected 0 < 1.6.6 ; affected 1.7.0 < 1.7.4 ; affected 1.8.0 < 1.8.3 |
| Red Hat · Red Hat Container Native Virtualization 4.12 | unaffected 1779375376 < * |
| Red Hat · Red Hat Container Native Virtualization 4.13 | unaffected 1778999881 < * |
| Red Hat · Red Hat Container Native Virtualization 4.14 | unaffected 1779321599 < * |
| Red Hat · Red Hat Container Native Virtualization 4.15 | unaffected 1778859977 < * |
| Red Hat · Red Hat Container Native Virtualization 4.16 | unaffected 1778861274 < * |
| Red Hat · Red Hat Container Native Virtualization 4.17 | unaffected 1779174925 < * |
| Red Hat · Red Hat Container Native Virtualization 4.18 | unaffected 1778887155 < * |
| Red Hat · Red Hat Container Native Virtualization 4.19 | unaffected 1779289071 < * |
| Red Hat · Red Hat Container Native Virtualization 4.20 | unaffected 1779288737 < * |
| Red Hat · Red Hat Container Native Virtualization 4.21 | unaffected 1779420069 < * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |