# CVE-2025-64434: KubeVirt Improper TLS Certificate Management Handling Allows API Identity Spoofing

CVE-2025-64434 is fixed in 2 products on 1 platform, first by SUSE-SU-2025:4330-1, released December 9, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-64434
- Priority: Routine
- CVSS: 4.7 (Moderate)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 7, 2025
- Weakness: Improper Authentication
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64434

## Description

This update for 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 fixes the following issues:  Updated kubevirt to version 1.6.3:    - CVE-2025-22872: Fixed incorrect interpretation of tags leading content to be placed wrong scope during DOM      construction in golang.org/x/net/html (bsc#1241772)   - CVE-2025-64432: Fixed bypass of RBAC controls due to incorrect validation of certain fields in the client     TLS certificate (bsc#1253181)   - CVE-2025-64433: Fixed arbitrary files read via improper symlink handling (bsc#1253185)   - CVE-2025-64434: Fixed privilege escalation via virt-api impersonification due to compromise virt-handler     instance (bsc#1253186)   - CVE-2025-64437: Fixed mishandling of symlinks (bsc#1253194)   - CVE-2025-64324: Fixed a logic bug that allows an attacker to read and write arbitrary files owned by more     privileged users (bsc#1253748)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | [OPENSUSE-SU-2026:21483-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21483-1.md) | Jul 30, 2026 |
| Linux | kubevirt sles 15.7 | 1.6.3-150700.3.13.1 | [SUSE-SU-2025:4330-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4330-1.md) | Dec 9, 2025 |

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Data as of 2026-11-10T13:56:55Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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