CVE-2025-64437

KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes

CVE-2025-64437 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.

Routine

CVSS

5.0

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0023

13th percentile

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

Product	Fixed in	Fix	Released
Linux
govulncheck-vulndb · opensuse-leap 16.0	0.0.20260723T184607-160000.1.1	OPENSUSE-SU-2026:21483-1	Jul 30, 2026
kubevirt · sles 15.7	1.6.3-150700.3.13.1	SUSE-SU-2025:4330-1	Dec 9, 2025

Details

Published
December 6, 2025
Weakness
Improper Link Resolution Before File Access ('Link Following')
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64437

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