Description
CNCF K3s 1.32 before 1.32.4-rc1+k3s1 has a Kubernetes kubelet configuration change with the unintended consequence that, in some situations, ReadOnlyPort is set to 10255. For example, the default behavior of a K3s online installation might allow unauthenticated access to this port, exposing credentials.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| K3s | K3s | 1.32 – < 1.32.4-rc1+k3s | 1.32.4-rc1+k3s |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20250506T153719-1.1 | openSUSE-SU-2025:15059-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | k3s +2 | 1.32.4.1-r0 | — |
| Wolfi rolling | k3s-1.32 +2 | 1.32.6.1-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/k3s-io/k3s | >= 1.32.0-rc1, < 1.32.4-rc1 | 1.32.4-rc1 | GHSA-864f-7xjm-2jp2 |
| Go | github.com/k3s-io/k3s | all versions | — | GO-2025-3646 |
Advisories 1
- openSUSE-SU-2025:15059-1 govulncheck-vulndb-0.0.20250506T153719-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
References
- https://github.com/f1veT/BUG/issues/2
- https://cloud.google.com/kubernetes-engine/docs/how-to/disable-kubelet-readonly-port
- https://github.com/k3s-io/k3s/issues/12164
- https://github.com/k3s-io/k3s/commit/097b63e588e3c844cdf9b967bcd0a69f4fc0aa0a
- https://github.com/k3s-io/k3s/compare/v1.32.3+k3s1...v1.32.4-rc1+k3s1