KubeEdge: Unbounded allocation in viaduct packer enables authenticated remote DoS against CloudHub
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-789.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| backstage | kubeedge | 1.0.0 to before 1.21.2; 1.22.0 to before 1.22.2; 1.23.0 to before 1.23.1 | 1.21.2, 1.22.2, 1.23.1 | Patch available | CNA |
| — | github.com/kubeedge/kubeedge (Go) | 1.0.0 to before 1.21.2 | 1.21.2 | Patch available | GHSA-gfw4-49f9-cp25 |
| — | github.com/kubeedge/kubeedge (Go) | 1.22.0 to before 1.22.2 | 1.22.2 | Patch available | GHSA-gfw4-49f9-cp25 |
| — | github.com/kubeedge/kubeedge (Go) | 1.23.0 to before 1.23.1 | 1.23.1 | Patch available | GHSA-gfw4-49f9-cp25 |
- kubeedge Vendorbackstage Affected 1.0.0 to before 1.21.2; 1.22.0 to before 1.22.2; 1.23.0 to before 1.23.1 Fixed in 1.21.2, 1.22.2, 1.23.1 Patch available CNA
- github.com/kubeedge/kubeedge (Go) Vendor— Affected 1.0.0 to before 1.21.2 Fixed in 1.21.2 Patch available GHSA-gfw4-49f9-cp25
- github.com/kubeedge/kubeedge (Go) Vendor— Affected 1.22.0 to before 1.22.2 Fixed in 1.22.2 Patch available GHSA-gfw4-49f9-cp25
- github.com/kubeedge/kubeedge (Go) Vendor— Affected 1.23.0 to before 1.23.1 Fixed in 1.23.1 Patch available GHSA-gfw4-49f9-cp25
Remediation
- Fix · CNA kubeedge (kubeedge) Fixed in 1.21.2, 1.22.2, 1.23.1
- Fix · GHSA-gfw4-49f9-cp25 github.com/kubeedge/kubeedge (Go) Fixed in 1.21.2 Advisory →
- Fix · GHSA-gfw4-49f9-cp25 github.com/kubeedge/kubeedge (Go) Fixed in 1.22.2 Advisory →
- Fix · GHSA-gfw4-49f9-cp25 github.com/kubeedge/kubeedge (Go) Fixed in 1.23.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-62370
- 2026-10-03 Alias added: GHSA-gfw4-49f9-cp25
References
Other 14
- https://github.com/kubeedge/kubeedge/security/advisories/GHSA-gfw4-49f9-cp25
- https://github.com/kubeedge/kubeedge/pull/7028
- https://github.com/kubeedge/kubeedge/pull/7029
- https://github.com/kubeedge/kubeedge/pull/7030
- https://github.com/kubeedge/kubeedge/commit/0fe1ea18e5d7fde29633286ddf1c7e71cb39606f
- https://github.com/kubeedge/kubeedge/commit/725a73ca35a65d91aa6338e52b8faaab6058f528
- https://github.com/kubeedge/kubeedge/commit/cc79621943fff9d3f62638d9403ef0cfeda3d0e7
- https://github.com/kubeedge/kubeedge/blob/master/CHANGELOG/CHANGELOG-1.21.md
- https://github.com/kubeedge/kubeedge/blob/master/CHANGELOG/CHANGELOG-1.22.md
- https://github.com/kubeedge/kubeedge/blob/master/CHANGELOG/CHANGELOG-1.23.md
- https://github.com/kubeedge/kubeedge/releases/tag/v1.21.2
- https://github.com/kubeedge/kubeedge/releases/tag/v1.22.2
- https://github.com/kubeedge/kubeedge/releases/tag/v1.23.1
- https://github.com/kubeedge/kubeedge
More backstage vulnerabilities
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- TI-2018-10499 Integer overflow in backstage kernel KEVCVSS 3.0HIGH 7.8
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- TI-2021-12074 Authentication vulnerability in MOSN v.0.23.0 allows attacker to escalate privileges via… CVSS 3.1CRITICAL 9.8
- TI-2019-04061 runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows… CVSS 3.1HIGH 8.6
Sources
- CVE-2026-62370 · CVE Program
- CVE-2026-62370 · NVD
- FIRST EPSS
- GHSA-gfw4-49f9-cp25 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences