CVE-2025-64437— KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes
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I. Basic Information for CVE-2025-64437
Vulnerability Information
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Vulnerability Title
KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes
Source: NVD (National Vulnerability Database)
Vulnerability Description
KubeVirt is a virtual machine management add-on for Kubernetes. In versions before 1.5.3 and 1.6.1, the virt-handler does not verify whether the launcher-sock is a symlink or a regular file. This oversight can be exploited, for example, to change the ownership of arbitrary files on the host node to the unprivileged user with UID 107 (the same user used by virt-launcher) thus, compromising the CIA (Confidentiality, Integrity and Availability) of data on the host. To successfully exploit this vulnerability, an attacker should be in control of the file system of the virt-launcher pod. This vulnerability is fixed in 1.5.3 and 1.6.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: NVD (National Vulnerability Database)
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 1.5.3之前版本和1.6.1之前版本存在后置链接漏洞，该漏洞源于virt-handler未验证launcher-sock是否为符号链接或常规文件，可能导致主机节点上任意文件所有权被更改。
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
II. Public POCs for CVE-2025-64437
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Same Patch Batch · kubevirt · 2025-11-07 · 6 CVEs total
| CVE-2025-64433 | 6.5 MEDIUM | KubeVirt Arbitrary Container File Read |
| CVE-2025-64435 | 5.3 MEDIUM | KubeVirt VMI Denial-of-Service (DoS) Using Pod Impersonation |
| CVE-2025-64432 | 4.7 MEDIUM | KubeVirt Affected by an Authentication Bypass in Kubernetes Aggregation Layer |
| CVE-2025-64434 | 4.7 MEDIUM | KubeVirt Improper TLS Certificate Management Handling Allows API Identity Spoofing |
| CVE-2025-64436 | KubeVirt Excessive Role Permissions Could Enable Unauthorized VMI Migrations Between Nodes |
IV. Related Vulnerabilities
Same product: kubevirt
- CVE-2025-64324
KubeVirt Vulnerable to Arbitrary Host File Read and Write - CVE-2025-64433
KubeVirt Arbitrary Container File Read - CVE-2025-64436
KubeVirt Excessive Role Permissions Could Enable Unauthorize - CVE-2025-64435
KubeVirt VMI Denial-of-Service (DoS) Using Pod Impersonation - CVE-2025-64434
KubeVirt Improper TLS Certificate Management Handling Allows
Same vendor: kubevirt
- CVE-2025-64324
KubeVirt Vulnerable to Arbitrary Host File Read and Write - CVE-2025-64433
KubeVirt Arbitrary Container File Read - CVE-2025-64436
KubeVirt Excessive Role Permissions Could Enable Unauthorize - CVE-2025-64435
KubeVirt VMI Denial-of-Service (DoS) Using Pod Impersonation - CVE-2025-64434
KubeVirt Improper TLS Certificate Management Handling Allows
Same weakness: CWE-59
- CVE-2021-47949
CyberPanel 2.1 Authenticated Remote Code Execution via Symli - CVE-2026-41882
JetBrains IntelliJ IDEA 后置链接漏洞 - CVE-2026-27105
Dell Alienware Purchased Apps 后置链接漏洞 - CVE-2026-5161
Improper Authentication in TUBITAK BILGEM's Pardus About - CVE-2026-41397
OpenClaw < 2026.3.31 - Sandbox Escape via Unrestricted File
V. Comments for CVE-2025-64437
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