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TI-2025-39850 Aliases CVE-2025-64437GHSA-2r4r-5x78-mvqf

KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes

Priority MEDIUM 56CWE-59Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00231 13th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial kubevirt (kubevirt): 1.5.3, 1.6.1kubevirt.io/kubevirt (Go): 1.5.3, 1.6.1Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
kubevirtkubevirtbefore 1.5.3; 1.6.0-alpha.0 to before 1.6.11.5.3, 1.6.1Patch availableCNA
—kubevirt.io/kubevirt (Go)before 1.5.31.5.3Patch availableGHSA-2r4r-5x78-mvqf
—kubevirt.io/kubevirt (Go)1.6.0-alpha.0 to before 1.6.11.6.1Patch availableGHSA-2r4r-5x78-mvqf
  • kubevirt Vendorkubevirt Affected before 1.5.3; 1.6.0-alpha.0 to before 1.6.1 Fixed in 1.5.3, 1.6.1 Patch available CNA
  • kubevirt.io/kubevirt (Go) Vendor— Affected before 1.5.3 Fixed in 1.5.3 Patch available GHSA-2r4r-5x78-mvqf
  • kubevirt.io/kubevirt (Go) Vendor— Affected 1.6.0-alpha.0 to before 1.6.1 Fixed in 1.6.1 Patch available GHSA-2r4r-5x78-mvqf

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:kubevirt:kubevirt:*:*:*:*:*:kubernetes:*:*before 1.5.3Vulnerablekubevirt
cpe:2.3:a:kubevirt:kubevirt:1.6.0:*:*:*:*:kubernetes:*:*1.6.0Vulnerablekubevirt
  • cpe:2.3:a:kubevirt:kubevirt:*:*:*:*:*:kubernetes:*:* Versions before 1.5.3 Vulnerable ·kubevirt
  • cpe:2.3:a:kubevirt:kubevirt:1.6.0:*:*:*:*:kubernetes:*:* Versions 1.6.0 Vulnerable ·kubevirt

Remediation

  • Fix · CNA kubevirt (kubevirt) Fixed in 1.5.3, 1.6.1
  • Fix · GHSA-2r4r-5x78-mvqf kubevirt.io/kubevirt (Go) Fixed in 1.5.3 Advisory →
  • Fix · GHSA-2r4r-5x78-mvqf kubevirt.io/kubevirt (Go) Fixed in 1.6.1 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Virtualization 4AffectedNo fix yet: Fix deferred
Red Hat Web TerminalAffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-64437
  2. 2026-10-03 Alias added: GHSA-2r4r-5x78-mvqf

References

Exploit 1

Patch 3

Advisory 1

Other 1

  • TI-2025-39759 KubeVirt Vulnerable to Arbitrary Host File Read and Write CVSS 4.0HIGH 8.5
  • TI-2022-01664 Path Traversal vulnerability in Kubevirt CVSS 3.1HIGH 8.7
  • TI-2025-39849 KubeVirt Excessive Role Permissions Could Enable Unauthorized VMI Migrations Between Nodes CVSS 4.0MEDIUM 6.9
  • TI-2025-39846 KubeVirt Arbitrary Container File Read CVSS 3.1MEDIUM 6.5
  • TI-2025-39847 KubeVirt Improper TLS Certificate Management Handling Allows API Identity Spoofing CVSS 3.1MEDIUM 6.3
  • TI-2025-39848 KubeVirt VMI Denial-of-Service (DoS) Using Pod Impersonation CVSS 3.1MEDIUM 5.3
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences