Remote Denial of Service in CoAP Option Parsing Due To Integer Overflow
Published Jun 5, 2020 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
Remote Denial of Service in CoAP Option Parsing Due To Integer Overflow
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- zephyrprojectsec.atlassian.net ↗
- docs.zephyrproject.org ↗
- Source repository ↗
- Source repository ↗
- Source repository ↗
- Source repository ↗
Record history
Published Jun 5, 2020 · Last refreshed Nov 3, 2026