CVE-2025-64437 | KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes

Exp

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.

Published: 2025-11-07 Last update: 2025-11-25 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-64437 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2025-64437

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-64437

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-08 — 0.01% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-64437

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 0.8 3.7 [email protected]

Weakness enumeration for CVE-2025-64437

GitHub Security Advisory for CVE-2025-64437

GHSA-2r4r-5x78-mvqf · Severity: medium · Ecosystem: go — KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes

OS Trackers for CVE-2025-64437

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2025-64437
suse low CVE-2025-64437 severity low: SUSE including 43 source package names (2.2.1-7.23:podman-5.4.2-slfo.1.1_2.1, containerized-data-importer, …), 104 product×package rows across 44 product lines (Container suse/sl-micro/6.1/baremetal-os-container, Image SL-Micro-Azure, … (44 product lines)): Known Not Affected 52, Fixed 51, First Fixed 1. https://www.suse.com/security/cve/CVE-2025-64437/

Affected software / configurations for CVE-2025-64437

Vendor Product Version Raw CPE
kubevirt kubevirt < 1.5.3 cpe:2.3:a:kubevirt:kubevirt:*:*:*:*:*:kubernetes:*:*
kubevirt kubevirt 1.6.0 cpe:2.3:a:kubevirt:kubevirt:1.6.0:*:*:*:*:kubernetes:*:*

References for CVE-2025-64437

cvelogic Threat Intelligence