CVE-2025-4563: K8s.io/kubernetes Remote Code Execution Vulnerability

LOW
Advisory Identifier: GHSA-hj2p-8wj8-pfq4
Share
CVSS 2.7
CWE-863
Published
Advisory Summary

CVE-2025-4563 is a LOW (CVSS 2.7) remote code execution vulnerability (CWE-863: Incorrect Authorization) affecting K8s.io/kubernetes libraries in the Go ecosystem. The issue involves kubernetes allows nodes to bypass dynamic resource allocation authorization checks. Remediation is available by upgrading affected packages to version 1.32.6, 1.33.2.

CVE-2025-4563 at a Glance

CVE Identifier CVE-2025-4563
GHSA Identifier GHSA-hj2p-8wj8-pfq4
Severity LOW
CVSS v3.1 Base Score 2.7
CWE Classification CWE-863: Incorrect Authorization
Affected Product K8s.io/kubernetes
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 2.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2025-4563

To remediate this vulnerability, upgrade all affected K8s.io/kubernetes dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

k8s.io/kubernetes fixed: 1.32.6 
Upgrade k8s.io/kubernetes to 1.32.6
k8s.io/kubernetes fixed: 1.33.2 
Upgrade k8s.io/kubernetes to 1.33.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for k8s.io/kubernetes

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-4563, inspect your project dependencies for K8s.io/kubernetes:

inspect dependencies for k8s.io/kubernetes

Analyze the terminal output to locate any version of K8s.io/kubernetes in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.32.6), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In K8s.io/kubernetes, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A vulnerability exists in the NodeRestriction admission controller where nodes can bypass dynamic resource allocation authorization checks. When the DynamicResourceAllocation feature gate is enabled, the controller properly validates resource claim statuses during pod status updates but fails to perform equivalent validation during pod creation. This allows a compromised node to create mirror pods that access unauthorized dynamic resources, potentially leading to privilege escalation.

CVE-2025-4563 Affected K8s.io/kubernetes Versions

2 component(s)
Fixed Versions:
1.32.61.33.2
Product / Package Ecosystem Affected Versions Fixed Version
k8s.io/kubernetes
golang/k8s.io/kubernetes
Go
≥ 1.32.0
< 1.32.6
1.32.6
k8s.io/kubernetes
golang/k8s.io/kubernetes
Go
≥ 1.33.0
< 1.33.2
1.33.2

References

NVD — CVE-2025-4563 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-4563
K8s.io/kubernetes Source Repository REPOSITORY
https://github.com/kubernetes/kubernetes/issues/132151
K8s.io/kubernetes Source Repository REPOSITORY
https://github.com/kubernetes/kubernetes/pull/131844
K8s.io/kubernetes Source Repository REPOSITORY
https://github.com/kubernetes/kubernetes/pull/131875
K8s.io/kubernetes Source Repository REPOSITORY
https://github.com/kubernetes/kubernetes/pull/131876
K8s.io/kubernetes Source Repository REPOSITORY
https://github.com/kubernetes/kubernetes
K8s.io/kubernetes Security Information SECURITY
https://groups.google.com/g/kubernetes-security-announce/c/Zv84LMRuvMQ
pkg.go.dev/vuln/go-2025-3774 WEB
https://pkg.go.dev/vuln/GO-2025-3774

Frequently Asked Questions

What is CVE-2025-4563?
CVE-2025-4563 is a security vulnerability in K8s.io/kubernetes involving kubernetes allows nodes to bypass dynamic resource allocation authorization checks under CWE-863: Incorrect Authorization.
Which K8s.io/kubernetes versions are affected?
Affected versions include releases prior to 1.32.6, 1.33.2 across affected packages: k8s.io/kubernetes.
What version fixes CVE-2025-4563?
Upgrading to 1.32.6, 1.33.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is k8s.io/kubernetes affected?
Yes, k8s.io/kubernetes is affected in releases prior to 1.32.6, 1.33.2. Upgrade your dependency to 1.32.6, 1.33.2 or later.
What is the CVSS score of CVE-2025-4563?
CVE-2025-4563 has a CVSS v3.1 base score of 2.7 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2025-4563?
CVE-2025-4563 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check Go dependencies for CVE-2025-4563?
Run the dependency tree command: 'inspect dependencies for k8s.io/kubernetes'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hj2p-8wj8-pfq4",
  "modified" : "2025-08-06T21:47:22Z",
  "published" : "2025-06-23T18:30:26Z",
  "aliases" : [ "CVE-2025-4563" ],
  "summary" : "kubernetes allows nodes to bypass dynamic resource allocation authorization checks",
  "details" : "A vulnerability exists in the NodeRestriction admission controller where nodes can bypass dynamic resource allocation authorization checks. When the DynamicResourceAllocation feature gate is enabled, the controller properly validates resource claim statuses during pod status updates but fails to perform equivalent validation during pod creation. This allows a compromised node to create mirror pods that access unauthorized dynamic resources, potentially leading to privilege escalation.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "k8s.io/kubernetes"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.32.0"
      }, {
        "fixed" : "1.32.6"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.32.5"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "k8s.io/kubernetes"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.33.0"
      }, {
        "fixed" : "1.33.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.33.1"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-4563"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kubernetes/kubernetes/issues/132151"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kubernetes/kubernetes/pull/131844"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kubernetes/kubernetes/pull/131875"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kubernetes/kubernetes/pull/131876"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kubernetes/kubernetes"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/kubernetes-security-announce/c/Zv84LMRuvMQ"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2025-3774"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-23T22:41:38Z",
    "nvd_published_at" : "2025-06-23T16:15:27Z"
  }
}