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Fencer Vulns
medium 5.0

CVE-2025-64437 json

KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes

published 2025-11-06 12 mo ago modified 2026-09-10 1 mo ago also EUVD-2025-38213 , GHSA-2r4r-5x78-mvqf , GO-2025-4102

cvss
5.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

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.

Patch / fix

  • go kubevirt.io/kubevirt 1.5.3, 1.6.0-beta.0.0.20250801202148-3ce9f41c54d0, 1.6.1
  • kubevirt kubevirt 1.5.3, 1.6.1
  • kubevirt SLE Module for Containers 15 SP7 1.6.3-150700.3.13.1

suse advisories SUSE-SU-2025:4330-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • kubevirt1.8 openSUSE Tumbleweed 1.8.3-1.1
  • kubevirt-1.8 openSUSE Tumbleweed 1.8.3-1.1
  • kubevirt openSUSE Tumbleweed 1.6.3-1.1

opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2026:11091-1openSUSE-SU-2026:11057-1openSUSE-SU-2025:15772-1

  • kubevirt Azure Linux 3.0 1.5.3-2
  • kubevirt CBL-Mariner 2.0 0.59.0-33

azure linux advisories AZL-69805AZL-69970

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-64437 updated cvss 5.0

kubevirt.io/kubevirt: KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes

  • Red Hat OpenShift Virtualization 4 kubevirt, container-native-virtualization/virt-api, container-native-virtualization/virt-handler, container-native-virtualization/virt-launcher, container-native-virtualization/virt-operator, container-native-virtualization/virt-api-rhel9, +22 more Red Hat Web Terminal web-terminal/web-terminal-tooling-rhel9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
11 mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/kubevirt/kubevirt/security/advisories/GHSA-2r4r-5x78-mvqf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.0 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
GitHub 3.1 5.0 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
go kubevirt.io/kubevirt
<1.5.3
>=1.6.0-alpha.0, <1.6.1
>=1.6.0-alpha.0, <1.6.0-beta.0.0.20250801202148-3ce9f41c54d0
1.5.3
1.6.1
1.6.0-beta.0.0.20250801202148-3ce9f41c54d0

Affected products

  • kubevirt kubevirt

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.