CVE-2025-0426 Node Denial of Service via kubelet Checkpoint API
Attackers can cause Node Denial of Service by filling disk space via unauthenticated kubelet checkpoint requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-0426?
CVE-2025-0426 is a medium-severity denial of service vulnerability in Kubernetes kubelet, published on 13 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security issue was discovered in Kubernetes where a large number of container checkpoint requests made to the unauthenticated kubelet read-only HTTP endpoint may cause a Node Denial of Service by filling the Node's disk.
Weakness: CWE-400
Which versions are affected by CVE-2025-0426?
9 open source packages ship an affected version, including k8s.io/kubernetes.
| Package | Affected | Fixed in |
|---|---|---|
k8s.io/kubernetes Go | All versions | 1.29.14, 1.30.10, 1.31.6, 1.32.2 |
k8s.io/kubernetes Go | All versions | 1.29.14 |
k8s.io/kubernetes Go | All versions | 1.29.14 |
k8s.io/kubernetes Go | From 1.30.0 | 1.30.10 |
k8s.io/kubernetes Go | From 1.30.0 | 1.30.10 |
k8s.io/kubernetes Go | From 1.31.0 | 1.31.6 |
3 more packages
k8s.io/kubernetes Go | From 1.31.0 | 1.31.6 |
k8s.io/kubernetes Go | From 1.32.0 | 1.32.2 |
k8s.io/kubernetes Go | From 1.32.0 | 1.32.2 |
Linux distribution packages (4)
kubernetes1.29 openSUSE:Tumbleweed | All versions | 1.29.14-1.1 |
kubernetes1.30 openSUSE:Tumbleweed | All versions | 1.30.10-1.1 |
kubernetes1.31 openSUSE:Tumbleweed | All versions | 1.31.6-1.1 |
kubernetes1.32 openSUSE:Tumbleweed | All versions | 1.32.2-1.1 |
How do I fix CVE-2025-0426?
Upgrade k8s.io/kubernetes to a fixed version for your release line: 1.29.14, 1.30.10, 1.31.6 or 1.32.2.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-0426 being exploited?
There is no known exploitation of CVE-2025-0426 in the wild and no public exploit code.
Sources
Also known as AZL-56714, CLEANSTART-2026-XP91043, DEBIAN-CVE-2025-0426, GHSA-jgfp-53c3-624w, GO-2025-3465, MINI-2rrx-986v-j839 and 9 more.