Summary
s2n-quic potential denial of service via crafted stream frames
Workarounds
There is no workaround. Applications using s2n-quic should upgrade to the most recent release of s2n-quic.
If you have any questions or comments about this advisory, we ask that you contact AWS Security via our vulnerability reporting page [2] or directly via email to [email protected]. Please do not create a public GitHub issue.
[1] https://github.com/aws/s2n-quic/releases/tag/v1.31.0
[2] https://aws.amazon.com/security/vulnerability-reporting
Impact
An issue in s2n-quic could result in unnecessary resource utilization when peers open streams beyond advertised limits.
Impacted versions: <= v1.30.0.
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 v1.31.0 [1].
Frequently Asked Questions
- What is GHSA-475V-PQ2G-FP9G? GHSA-475V-PQ2G-FP9G is a low-severity security vulnerability in s2n-quic (rust), affecting versions <= 1.30.0. It is fixed in 1.31.0.
- Which versions of s2n-quic are affected by GHSA-475V-PQ2G-FP9G? s2n-quic (rust) versions <= 1.30.0 is affected.
- Is there a fix for GHSA-475V-PQ2G-FP9G? Yes. GHSA-475V-PQ2G-FP9G is fixed in 1.31.0. Upgrade to this version or later.
- Is GHSA-475V-PQ2G-FP9G exploitable, and should I be worried? Whether GHSA-475V-PQ2G-FP9G 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-475V-PQ2G-FP9G 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-475V-PQ2G-FP9G? Upgrade
s2n-quicto 1.31.0 or later.