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CVE-2026-7374— Kubevirt: kubevirt virt-handler: privilege escalation and node compromise via symlink following vulnerability

Quick assessment

Affected
CVE-2026-7374
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kubevirt是KubeVirt开源的一款虚拟机管理器。 Kubevirt存在后置链接漏洞，该漏洞源于符号链接验证不当，可能导致认证的OpenShift用户在单个命名空间中通过替换控制台套接字为指向主机容器运行时套接字的符号链接，劫持virt-handler的特权连接，从而访问主机上任何Unix套接字，可能导致节点和整个集群完全控制。

CVSS 9.9 · Critical EPSS 0.83% · P56

Affected Version Matrix 13

VendorProduct Version RangeStatus
None None < 1.6.6 affected
1.7.0< 1.7.4 affected
1.8.0< 1.8.3 affected
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

I. Basic Information for CVE-2026-7374

Vulnerability Information
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Vulnerability Title
Kubevirt: kubevirt virt-handler: privilege escalation and node compromise via symlink following vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Kubevirt 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kubevirt是KubeVirt开源的一款虚拟机管理器。 Kubevirt存在后置链接漏洞，该漏洞源于符号链接验证不当，可能导致认证的OpenShift用户在单个命名空间中通过替换控制台套接字为指向主机容器运行时套接字的符号链接，劫持virt-handler的特权连接，从而访问主机上任何Unix套接字，可能导致节点和整个集群完全控制。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 1.6.6 -
Red Hat Red Hat Container Native Virtualization 4.12 1779375376 ~ * cpe:/a:redhat:container_native_virtualization:4.12::el8
Red Hat Red Hat Container Native Virtualization 4.13 1778999881 ~ * cpe:/a:redhat:container_native_virtualization:4.13::el9
Red Hat Red Hat Container Native Virtualization 4.14 1779321599 ~ * cpe:/a:redhat:container_native_virtualization:4.14::el9
Red Hat Red Hat Container Native Virtualization 4.15 1778859977 ~ * cpe:/a:redhat:container_native_virtualization:4.15::el9
Red Hat Red Hat Container Native Virtualization 4.16 1778861274 ~ * cpe:/a:redhat:container_native_virtualization:4.16::el9
Red Hat Red Hat Container Native Virtualization 4.17 1779174925 ~ * cpe:/a:redhat:container_native_virtualization:4.17::el9
Red Hat Red Hat Container Native Virtualization 4.18 1778887155 ~ * cpe:/a:redhat:container_native_virtualization:4.18::el9
Red Hat Red Hat Container Native Virtualization 4.19 1779289071 ~ * cpe:/a:redhat:container_native_virtualization:4.19::el9
Red Hat Red Hat Container Native Virtualization 4.20 1779288737 ~ * cpe:/a:redhat:container_native_virtualization:4.20::el9
Red Hat Red Hat Container Native Virtualization 4.21 1779420069 ~ * cpe:/a:redhat:container_native_virtualization:4.21::el9

II. Public POCs for CVE-2026-7374

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III. Intelligence Information for CVE-2026-7374

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Vendor Advisories for CVE-2026-7374 (3)

Other References for CVE-2026-7374 (9)

IV. Related Vulnerabilities

Same weakness: CWE-59

V. Comments for CVE-2026-7374

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