Summary
s2n-quic potential denial of service vulnerability when receiving empty UDP packets
Impact
An issue in s2n-quic results in the endpoint shutting down after receiving an empty UDP packet on a connection.
No AWS services are affected by this issue and customers of AWS services do not need to take action. Applications using s2n-quic should upgrade their application to the most recent release of s2n-quic.
Impacted version: s2n-quic v1.22.0.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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The patch is included in s2n-quic v1.23.0.
If you have any questions or comments about this advisory we ask that you contact AWS/Amazon Security via our vulnerability reporting page or directly via email to [email protected]. Please do not create a public GitHub issue.
Frequently Asked Questions
- What is GHSA-HXQ4-MX37-FQVG? GHSA-HXQ4-MX37-FQVG is a medium-severity security vulnerability in s2n-quic (rust), affecting versions = 1.22.0. It is fixed in 1.23.0.
- Which versions of s2n-quic are affected by GHSA-HXQ4-MX37-FQVG? s2n-quic (rust) versions = 1.22.0 is affected.
- Is there a fix for GHSA-HXQ4-MX37-FQVG? Yes. GHSA-HXQ4-MX37-FQVG is fixed in 1.23.0. Upgrade to this version or later.
- Is GHSA-HXQ4-MX37-FQVG exploitable, and should I be worried? Whether GHSA-HXQ4-MX37-FQVG is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-HXQ4-MX37-FQVG is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-HXQ4-MX37-FQVG? Upgrade
s2n-quicto 1.23.0 or later.