{"id":"CVE-2026-115417","title":"Memory allocation with excessive size value in the MQTT 3.1.1 compatibility adapter in aws-c-mqtt","summary":"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.\n\n\n\nTo remediate this issue, users shou…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-789"],"vendor":"AWS","product":"aws-c-mqtt","affected":["aws-c-mqtt >= 0.9.1 < 0.16.2"],"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T20:34:50.961Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115417","references":[{"url":"https://github.com/awslabs/aws-c-mqtt/releases/tag/v0.16.2"},{"url":"https://github.com/awslabs/aws-c-mqtt/security/advisories/GHSA-g3x5-86mr-65p5"},{"url":"https://aws.amazon.com/security/security-bulletins/2026-147-aws/"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T22:00:50.419Z","slug":"CVE-2026-115417","body":"## Overview\n\nMemory 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.\n\n\n\nTo 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.\n\n## Affected\n\n- `aws-c-mqtt >= 0.9.1 < 0.16.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}