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CVE-2021-25749

runAsNonRoot logic bypass for Windows containers

7.8 High

Windows workloads can run as ContainerAdministrator even when those workloads set the runAsNonRoot option to true.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.21%Up 0.2 points since May 25, 2023
90%50%10%1%

What each source reports

CVE List Score used 7.8

runAsNonRoot logic bypass for Windows containers

Windows workloads can run as ContainerAdministrator even when those workloads set the runAsNonRoot option to true.

Record
CVE-2021-25749
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-284
Updated
2026-11-02
EUVDEUVD-2021-12632 7.8

Windows workloads can run as ContainerAdministrator even when those workloads set the runAsNonRoot option to true.

Record
EUVD-2021-12632
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-vv2r-w4hf-7mhr 7.8

Windows workloads can run as ContainerAdministrator even when those workloads set the...

Windows workloads can run as ContainerAdministrator even when those workloads set the runAsNonRoot option to true.

Record
GHSA-vv2r-w4hf-7mhr
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-284
Updated
2026-11-02
NVD 7.8

Windows workloads can run as ContainerAdministrator even when those workloads set the runAsNonRoot option to true.

Record
CVE-2021-25749
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-284
Updated
2026-11-02
OSV 7.8

Windows workloads can run as ContainerAdministrator even when those workloads set the runAsNonRoot option to true.

Record
CVE-2021-25749
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:12780-1 No score

kubernetes1.23-apiserver-1.23.17-1.1 on GA media

These are all security issues fixed in the kubernetes1.23-apiserver-1.23.17-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:12780-1
Updated
2026-11-02
OSVSUSE-SU-2023:2292-1 No score

Security update for kubernetes1.23

This update for kubernetes1.23 fixes the following issues:

  • add kubernetes1.18-client-common as conflicts with kubernetes-client-bash-completion

  • Split individual completions into separate packages

Update to version 1.23.17:

  • releng: Update images, dependencies and version to Go 1.19.6
  • Update golang.org/x/net to v0.7.0
  • Pin golang.org/x/net to v0.4.0
  • add scale test for probes
  • use custom dialer for http probes
  • use custom dialer for tcp probes
  • add custom dialer optimized for probes
  • egress_selector: prevent goroutines leak on connect() step.
  • tls.Dial() validates hostname, no need to do that manually
  • Fix issue that Audit Server could not correctly encode DeleteOption
  • Do not include scheduler name in the preemption event message
  • Do not leak cross namespace pod metadata in preemption events
  • pkg/controller/job: re-honor exponential backoff
  • releng: Update images, dependencies and version to Go 1.19.5
  • Bump Konnectivity to v0.0.35
  • Improve vendor verification works for each staging repo
  • Update to go1.19
  • Adjust for os/exec changes in 1.19
  • Update golangci-lint to 1.46.2 and fix errors
  • Match go1.17 defaults for SHA-1 and GC
  • update golangci-lint to 1.45.0
  • kubelet: make the image pull time more accurate in event
  • change k8s.gcr.io/pause to registry.k8s.io/pause
  • use etcd 3.5.6-0 after promotion
  • changelog: CVE-2022-3294 and CVE-2022-3162 were fixed in v1.23.14
  • Add CVE-2021-25749 to CHANGELOG-1.23.md
  • Add CVE-2022-3294 to CHANGELOG-1.23.md
  • kubeadm: use registry.k8s.io instead of k8s.gcr.io
  • etcd: Updated to v3.5.5
  • Bump konnectivity network proxy to v0.0.33. Includes a couple bug fixes for better handling of dial failures. Agent & Server include numerous other fixes.
  • kubeadm: allow RSA and ECDSA format keys in preflight check
  • Fixes kubelet log compression on Windows
  • Reduce default gzip compression level from 4 to 1 in apiserver
  • exec auth: support TLS config caching
  • Marshal MicroTime to json and proto at the same precision
  • Windows: ensure runAsNonRoot does case-insensitive comparison on user name
  • update structured-merge-diff to 4.2.3
  • Add rate limiting when calling STS assume role API
  • Fixing issue in generatePodSandboxWindowsConfig for hostProcess containers by where pod sandbox won't have HostProcess bit set if pod does not have a security context but containers specify HostProcess.
Record
SUSE-SU-2023:2292-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
kubernetes1.23
SUSE:Linux Enterprise Module for Containers 15 SP4
From an advisory covering 3 CVEs
before 1.23.17-150300.7.6.1
1.23.17-150300.7.6.1
kubernetes1.23
SUSE:Linux Enterprise High Performance Computing 15 SP3-ESPOS
From an advisory covering 3 CVEs
before 1.23.17-150300.7.6.1
1.23.17-150300.7.6.1
kubernetes1.23
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS
From an advisory covering 3 CVEs
before 1.23.17-150300.7.6.1
1.23.17-150300.7.6.1
kubernetes1.23
SUSE:Linux Enterprise Server 15 SP3-LTSS
From an advisory covering 3 CVEs
before 1.23.17-150300.7.6.1
1.23.17-150300.7.6.1
kubernetes1.23
SUSE:Linux Enterprise Server for SAP Applications 15 SP3
From an advisory covering 3 CVEs
before 1.23.17-150300.7.6.1
1.23.17-150300.7.6.1
kubernetes1.23
SUSE:Enterprise Storage 7.1
From an advisory covering 3 CVEs
before 1.23.17-150300.7.6.1
1.23.17-150300.7.6.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-25749 is a high vulnerability (CVSS 7.8) in Kubernetes, published May 24, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 11th percentile. No source names a fixed version.

References

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