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CVE-2023-5528

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

HIGH
8.8
CVSS Score
Published: November 14, 2023 at 08:32 PM UTC
Updated: June 17, 2026 at 06:48 AM UTC
3 products affected across 2 vendorsFedoraKubernetesKubelet· also runs on 1 platform

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Severity
HIGH8.8
Exploit prediction
EPSS 4%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
373839
Kubernetes· Kubernetes
95%
1.26.0 ≤ v < 1.26.111.27.0 ≤ v < 1.27.81.28.0 ≤ v < 1.28.41.8.0 ≤ v < 1.25.16
Affected range stops below 1.25.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.26.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.27.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.28.4, so it looks safe — our inference, not a vendor statement
microsoft-windows (environment)
Kubelet· Kubernetes
60%
v ≤ v1.25.15v1.26.0 ≤ v ≤ v1.26.10v1.27.0 ≤ v ≤ v1.27.7v1.28.0 ≤ v ≤ v1.28.31.26.01.27.01.28.0
Vendor states this is fixed in v1.25.16 (unaffected)
Vendor states this is fixed in v1.26.11 (unaffected)
Vendor states this is fixed in v1.27.8 (unaffected)
Vendor states this is fixed in v1.28.4 (unaffected)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

References (6)

Issue TrackingPatch
Source: [email protected]
https://github.com/kubernetes/kubernetes/issues/121879
Mailing List
Source: [email protected]
https://groups.google.com/g/kubernetes-security-announce/c/SL_d4NR8pzA
PatchRelease Notes
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/[email protected]/message/3JH444PWZBINXLLFV7XLIJIZJHSK6UEZ/
PatchRelease Notes
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/[email protected]/message/4XZIX727JIKF5RQW7RVVBLWXBCDIBJA7/
PatchRelease Notes
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/[email protected]/message/7MPGMITSZXUCAVO7Q75675SOLXC2XXU4/
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.netapp.com/advisory/ntap-20240119-0009/

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-20NVD-CWE-noinfo

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