PatchTheCVECVE-2026-115417: Memory allocation with excessive size value in the MQTT 3.1.1 compatibility adapter in AWS aws-c-mqtt before 0
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This month
HIGH 7.5REMOTEWATCHLIST
CVE-2026-115417 is a high-severity flaw (CVSS 7.5) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 73%) |
| CISA exploited list | No |
| Weakness | CWE-789 |
| Published | 2026-10-22 |
| Last modified | 2026-10-23 |
Publisher (CNA): AMZN
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Fedora 46 · retext · FIXED · 8.1.0-1.fc46 · FEDORA-2026-0602a84203 · source
sudo dnf upgrade --advisory=FEDORA-2026-0602a84203
Advisories and coverage
Official advisories
- AWS Security Bulletins: CVE-2026-115417 - Memory allocation with excessive size value in the MQTT 3.1.1 compatibility adapter in aws-c-mqtt 2026-10-22
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.