KubeEdge: Unbounded allocation in viaduct packer enables authenticated remote DoS against CloudHub

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

• CVE-2026-62370: 0.50% estimated exploitation activity in the next 30 days; percentile 43.15 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary KubeEdge CloudHub uses the viaduct packer to decode messages received from connected peers. The packer reads a 32-bit payload length from the message header and previously allocated a buffer of that size without enforcing an upper bound. An authenticated peer that can establish a viaduct connection to CloudHub can send a crafted message header containing an excessively large payload length. This may cause CloudHub to allocate a large amount of memory and can result in memory exhaustion, process termination, or denial of service. Impact A successfully authenticated malicious or compromised edge node may repeatedly send crafted viaduct message headers to increase CloudHub memory consumption. Depending on available memory and deployment limits, exploitation may cause: Increased CloudHub memory usage Out-of-memory termination CloudHub restart loops Temporary disruption of cloud-edge communication Authentication to the viaduct endpoint is required. This issue does not provide…

Published by the source

22 Sep 2026, 20:37 UTC

Last modified by the source

1 Oct 2026, 20:45 UTC

Source last checked

26 Oct 2026, 15:29 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-gfw4-49f9-cp25

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GO-2026-6569

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-gfw4-49f9-cp25

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-62370

Advisory: KubeEdge: Unbounded allocation in viaduct packer enables authenticated remote DoS against CloudHub
IDs: CVE-2026-62370, GHSA-gfw4-49f9-cp25
Record: https://patchnext.com/advisories/cve-2026-62370 (revision 3, source checked 26 Oct 2026, 15:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/kubeedge/kubeedge 1.23.1, 1.22.2, 1.21.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/kubeedge/kubeedge: affected >= 1.0.0, < 1.21.2; >= 1.22.0, < 1.22.2; >= 1.23.0, < 1.23.1; fixed in 1.21.2, 1.23.1, 1.22.2

## Suggested inspection (read-only)
- Go github.com/kubeedge/kubeedge: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/kubeedge/kubeedge.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-gfw4-49f9-cp25 (OSV record GHSA-gfw4-49f9-cp25 lists affected ranges: Go github.com/kubeedge/kubeedge >=1.0.0 =1.22.0 =1.23.0 <1.23.1 (fixed))
- Verified: https://osv.dev/vulnerability/GO-2026-6569 (OSV record GO-2026-6569 lists affected ranges: Go github.com/kubeedge/kubeedge >=1.0.0 =1.22.0 =1.23.0 <1.23.1 (fixed))
- Verified: https://github.com/advisories/GHSA-gfw4-49f9-cp25 (GitHub-reviewed advisory GHSA-gfw4-49f9-cp25 lists affected ranges: Go github.com/kubeedge/kubeedge >=1.0.0 =1.22.0 =1.23.0 <1.23.1)

Commands are suggestions: review each one before running it.