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Fencer Vulns
high 7.2

CVE-2023-5528 json

Kubernetes - Windows nodes - Insufficient input sanitization in in-tree storage plugin leads to privilege escalation

published 2023-11-14 2 y ago modified 2026-09-10 1 mo ago also GHSA-hq6q-c2x6-hmch , GO-2023-2341 , EUVD-2023-2977

cvss
7.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
4.1%
EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

A security issue was discovered in Kubernetes where a user that can create pods and persistent volumes on Windows nodes may be able to escalate to admin privileges on those nodes. Kubernetes clusters are only affected if they are using an in-tree storage plugin for Windows nodes.

Patch / fix

  • go k8s.io/kubernetes 1.25.16, 1.26.11, 1.27.8, 1.28.4
  • Kubernetes kubelet v1.25.16, v1.26.11, v1.27.8, v1.28.4
  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250807T150727-1.1

opensuse advisories openSUSE-SU-2025:15424-1

  • kubernetes CBL-Mariner 2.0 1.28.4-1
  • kubernetes Azure Linux 3.0 1.28.7-2

azure linux advisories AZL-32005AZL-34894

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-2023-5528 updated cvss 8.8

kubernetes: Insufficient input sanitization in in-tree storage plugin leads to privilege escalation on Windows nodes

  • Red Hat OpenShift Container Platform 4.11 openshift4-wincw/windows-machine-config-rhel8-operator 6.0.3-9, openshift4-wincw/windows-machine-config-operator-bundle v6.0.3-8
    fixed: vendor fix RHSA-2023:7662
  • Red Hat OpenShift Container Platform 4.12 openshift4-wincw/windows-machine-config-rhel8-operator 7.2.0-30, openshift4-wincw/windows-machine-config-operator-bundle v7.2.0-29
    fixed: vendor fix RHSA-2023:7710
  • Red Hat OpenShift Container Platform 4.13 openshift4-wincw/windows-machine-config-rhel9-operator 8.1.1-6, openshift4-wincw/windows-machine-config-operator-bundle v8.1.1-7
    fixed: vendor fix RHSA-2023:7709
  • Red Hat OpenShift Container Platform 4.14 openshift4/windows-machine-config-operator-bundle v9.0.1-15, openshift4-wincw/windows-machine-config-rhel9-operator 9.0.1-16, openshift4-wincw/windows-machine-config-operator-bundle v9.0.1-15
    fixed: vendor fix RHSA-2024:1203
  • Red Hat OpenShift Container Platform 4.15 openshift4-wincw/windows-machine-config-rhel9-operator 10.15.0-46, openshift4-wincw/windows-machine-config-operator-bundle v10.15.0-43
    fixed: vendor fix RHSA-2024:0954

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
total
Assessed
2 y ago

Exploit prediction

4.09% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go k8s.io/kubernetes
>=1.28.0, <1.28.4
>=1.27.0, <1.27.8
>=1.26.0, <1.26.11
<1.25.16
1.28.4
1.27.8
1.26.11
1.25.16

Affected products

  • Kubernetes kubelet

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds

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.