Description
KubeEdge is an open source system for extending native containerized application orchestration capabilities to hosts at Edge. From 1.0.0 until 1.21.2, 1.22.2, and 1.23.1, Reader.Read in pkg/viaduct/pkg/packer trusts the 32-bit PackageHeader.PayloadLen received through the CloudHub viaduct message-processing path and allocates that amount of memory before validating an upper bound. An authenticated malicious or compromised edge peer can repeatedly send crafted headers with excessive declared lengths, causing memory exhaustion, CloudHub process termination or restart loops, and temporary disruption of cloud-edge communication. This issue does not provide unauthenticated access or direct code execution. This issue is fixed in versions 1.21.2, 1.22.2, and 1.23.1.
References10
- github.com/kubeedge/kubeedge/blob/master/CHANGELOG/CHANGELOG-1.…
- github.com/kubeedge/kubeedge/blob/master/CHANGELOG/CHANGELOG-1.…
- github.com/kubeedge/kubeedge/blob/master/CHANGELOG/CHANGELOG-1.…
- github.com/kubeedge/kubeedge/commit/0fe1ea18e5d7fde29633286ddf1…
- github.com/kubeedge/kubeedge/commit/725a73ca35a65d91aa6338e52b8…
- github.com/kubeedge/kubeedge/commit/cc79621943fff9d3f62638d9403…
- github.com/kubeedge/kubeedge/pull/7028
- github.com/kubeedge/kubeedge/pull/7029
- github.com/kubeedge/kubeedge/pull/7030
- github.com/kubeedge/kubeedge/releases/tag/v1.21.2
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 43 · as of 8 November 2026
- CWE
- CWE-789
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.