CVE-2026-115417
Memory allocation with excessive size value in the MQTT 3.1.1 compatibility adapter in aws-c-mqtt
- State
- Published
- Severity
- 8.2 High
- Published
- Oct 22, 2026
- Updated
- Oct 29, 2026
- Reserved
- Oct 22, 2026
Description
Memory allocation with excessive size value in the MQTT 3.1.1 compatibility adapter in AWS aws-c-mqtt before 0.16.2 might allow a remote actor to cause a denial of service of the client application.
To remediate this issue, users should upgrade to aws-c-mqtt 0.16.2 or later, or to an AWS Common Runtime or AWS IoT Device SDK release that bundles it.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | AMZN |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | AMZN |
Weaknesses
- CWE-789 Memory allocation with excessive size value
Affected Products
| Product | Versions |
|---|---|
aws-c-mqttAWS |
|
References
- https://github.com/awslabs/aws-c-mqtt/releases/tag/v0.16.2release-notespatch
- https://github.com/awslabs/aws-c-mqtt/security/advisories/GHSA-g3x5-86mr-65p5third-party-advisory
- https://aws.amazon.com/security/security-bulletins/2026-147-aws/vendor-advisory
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