KubeVirt up to 1.5.2/1.6.0 on Kubernetes link following

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in KubeVirt up to 1.5.2/1.6.0 on Kubernetes. This affects an unknown function. This manipulation causes link following. This vulnerability appears as CVE-2025-64437. The attack requires local access. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in KubeVirt up to 1.5.2/1.6.0 on Kubernetes. It has been declared as problematic. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-64437 since 11/03/2025. The exploitation appears to be difficult. Attacking locally is a requirement. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 278074 (SUSE SLES15 Security Update : kubevirt, virt-api-container, virt-controller-container, virt-exportproxy-container, virt-exportserver-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container, virt-pr-helper-container (SUSE-SU-2025:4330-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.5.3 or 1.6.1 eliminates this vulnerability. Applying the patch 3ce9f41c54d04a65f10b23a46771391c00659afb is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (278074). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.9
VulDB Temp Score: 3.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.0
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 278074
Nessus Name: SUSE SLES15 Security Update : kubevirt, virt-api-container, virt-controller-container, virt-exportproxy-container, virt-exportserver-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container, virt-pr-helper-container (SUSE-SU-2025:4330-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: KubeVirt 1.5.3/1.6.1
Patch: 3ce9f41c54d04a65f10b23a46771391c00659afb

Timelineinfo

11/03/2025 CVE reserved
11/08/2025 +5 days Advisory disclosed
11/08/2025 +0 days VulDB entry created
12/11/2025 +33 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-2r4r-5x78-mvqf
Status: Confirmed

CVE: CVE-2025-64437 (🔒)
GCVE (CVE): GCVE-0-2025-64437
GCVE (VulDB): GCVE-100-331603

Entryinfo

Created: 11/08/2025 07:55
Updated: 12/11/2025 16:04
Changes: 11/08/2025 07:55 (66), 11/27/2025 05:34 (1), 12/11/2025 16:04 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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