GHSA-2x7m-gf85-3745
HIGHRemote Denial of Service Vulnerability in Microsoft QUIC
Blast Radius
Microsoft.Native.Quic.MsQuic.OpenSSL.NETMicrosoft.Native.Quic.MsQuic.Schannel.NETMicrosoft.Native.Quic.MsQuic.Schannel.NETMicrosoft.Native.Quic.MsQuic.Schannel.NETMicrosoft.Native.Quic.MsQuic.OpenSSL.NETMicrosoft.Native.Quic.MsQuic.OpenSSLReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.
Description
Impact
The MsQuic server will continue to leak memory until no more is available, resulting in a denial of service.
Patches
The following patch was made:
- Fix Memory Leak from Multiple Decodes of TP - https://github.com/microsoft/msquic/commit/5d070d661c45979946615289e92bb6b822efe9e9
Workarounds
Beyond upgrading to the patched versions, there is no other workaround.
MSRC CVE Info
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-26190
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | Microsoft.Native.Quic.MsQuic.OpenSSL | all versions | 2.1.12 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.Schannel | ≥ 2.2.0&&< 2.2.7 | 2.2.7 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.Schannel | ≥ 2.3.0&&< 2.3.5 | 2.3.5 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.Schannel | all versions | 2.1.12 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.OpenSSL | ≥ 2.2.0&&< 2.2.7 | 2.2.7 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.OpenSSL | ≥ 2.3.0&&< 2.3.5 | 2.3.5 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.Native.Quic.MsQuic.OpenSSL. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update Microsoft.Native.Quic.MsQuic.OpenSSL to 2.1.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2x7m-gf85-3745 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-2x7m-gf85-3745 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-2x7m-gf85-3745. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-2x7m-gf85-3745 in your dependencies?
O3 detects GHSA-2x7m-gf85-3745 across NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.