6.3

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

Analyzed
AliasesCGA-6vjv-4rp7-8xvgCGA-hc8q-gg5w-893hGHSA-ggp9-c99x-54gp
Published 07-11-2025Last modified 10-11-2025

Vulnerability summary

CVE-2025-64434 is a medium (CVSS 6.3) Improper Authentication vulnerability in kubevirt. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.6% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.20%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 6 · Related 7
OPENSUSE-SU-2026:20281-1OPENSUSE-SU-2026:21483-1SUSE-SU-2025:4330-1SUSE-SU-2026:20551-1SUSE-SU-2026:20571-1SUSE-SU-2026:20610-1

Timeline

  1. 07-11-2025
    PublishedVulnerability first disclosed.
  2. 10-11-2025
    Last modifiedVulnerability information updated.

Description

KubeVirt is a virtual machine management add-on for Kubernetes. Prior to 1.5.3 and 1.6.1, due to the peer verification logic in virt-handler (via verifyPeerCert), an attacker who compromises a virt-handler instance, could exploit these shared credentials to impersonate virt-api and execute privileged operations against other virt-handler instances potentially compromising the integrity and availability of the VM managed by it. This vulnerability is fixed in 1.5.3 and 1.6.1.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.18% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Kubevirt

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard1 product
  • docker-machine-driver-harvester< 1.0.6-r4
Kubevirt1 product
  • kubevirt≥ 1.6.0-alpha.0, < 1.6.1 | < 1.5.3 | 1.6.0
Kubevirt.io1 product
  • kubevirt< 1.5.3 | ≥ 1.6.0-alpha.0, < 1.6.1 | ≥ 1.6.0-rc.0, < 1.6.1
Wolfi1 product
  • docker-machine-driver-harvester< 1.0.6-r4

4 vendors · 4 products

References

7 links