.NET Denial of Service Vulnerability
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 6.0, .NET 5.0 and .NET Core 3.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A vulnerability exists in .NET 6.0, .NET 5.0 and .NET core 3.1 where a malicious client can can cause a denial of service when HTML forms are parsed.
Affected software
- Any .NET 6.0 application running on .NET 6.0.4 or earlier.
- Any .NET 5.0 application running .NET 5.0.16 or earlier.
- Any .NET Core 3.1 application running on .NET Core 3.1.24 or earlier.
Affected packages
.NET Core 3.1
| Package name | Affected version | Patched version |
|---|---|---|
| Microsoft.AspNetCore.App.Runtime.win-x64 | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.linux-x64 | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.win-x86 | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.osx-x64 | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.linux-arm64 | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.linux-arm | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.win-arm64 | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.win-arm | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | >=3.0.0,3.1.24 | 3.1.25 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm | >=3.0.0,3.1.24 | 3.1.25 |
.NET 5.0
| Package name | Affected version | Patched version |
|---|---|---|
| Microsoft.AspNetCore.App.Runtime.win-x64 | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.linux-x64 | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.win-x86 | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.osx-x64 | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.linux-arm64 | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.linux-arm | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.win-arm64 | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.win-arm | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | >=5.0.0,5.0.16 | 5.0.17 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm | >=5.0.0,5.0.16 | 5.0.17 |
.NET 6.0
| Package name | Affected version | Patched version |
|---|---|---|
| Microsoft.AspNetCore.App.Runtime.win-x64 | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.linux-x64 | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.win-x86 | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.osx-x64 | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.linux-arm64 | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.linux-arm | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.win-arm64 | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.win-arm | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.osx-arm64 | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | >=6.0.0,6.0.4 | 6.0.5 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm | >=6.0.0,6.0.4 | 6.0.5 |
Patches
-
If you're using .NET Core 6.0, you should download and install Runtime 6.0.5 or SDK 6.0.105 (for Visual Studio 2022 v17.0) or SDK 6.0.203 (for Visual Studio 2022 v17.1) from https://dotnet.microsoft.com/download/dotnet-core/6.0.
-
If you're using .NET 5.0, you should download and install Runtime 5.0.17 or SDK 5.0.214 (for Visual Studio 2019 v16.9) or SDK 5.0.408 (for Visual Studio 2011 v16.11) from https://dotnet.microsoft.com/download/dotnet-core/5.0.
-
If you're using .NET Core 3.1, you should download and install Runtime 3.1.25 or SDK 3.1.419 (for Visual Studio 2019 v16.9 or Visual Studio 2011 16.11 or Visual Studio 2022 17.0 or Visual Studio 2022 17.1 ) from https://dotnet.microsoft.com/download/dotnet-core/3.1.
.NET 6.0, .NET 5.0 and .NET Core 3.1 updates are also available from Microsoft Update. To access this either type "Check for updates" in your Windows search, or open Settings, choose Update & Security and then click Check for Updates.
Other
Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/222 An Issue for this can be found at https://github.com/dotnet/aspnetcore/issues/41609 MSRC details for this can be found at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-29145
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.linux-arm | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.linux-arm64 | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.linux-musl-arm | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.linux-x64 | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.osx-x64 | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.win-arm | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.win-arm64 | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.win-x64 | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
| .NET (NuGet) | Microsoft.AspNetCore.App.Runtime.win-x86 | >= 3.0.0, < 3.1.25, >= 5.0.0, < 5.0.17, >= 6.0.0, < 6.0.5 | 3.1.25, 5.0.17, 6.0.5 |
References
- https://github.com/dotnet/aspnetcore/security/advisories/GHSA-fcg8-mg9g-6hc4
- https://nvd.nist.gov/vuln/detail/CVE-2022-29145
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNXQL7EZORGU4PZCPJ5EPQ4P7IEY3ZZO
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IBYSBUDJYQ76HK4TULXVIIPCKK2U6WDB
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W5FPEQ6BTYRGTS6IYCDTZW6YF5HLQ3BY
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNXQL7EZORGU4PZCPJ5EPQ4P7IEY3ZZO
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IBYSBUDJYQ76HK4TULXVIIPCKK2U6WDB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W5FPEQ6BTYRGTS6IYCDTZW6YF5HLQ3BY
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-29145
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-29145
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400- Platform
- .NET (NuGet)
- Package
Microsoft.AspNetCore.App.Runtime.linux-arm, Microsoft.AspNetCore.App.Runtime.linux-arm64, Microsoft.AspNetCore.App.Runtime.linux-musl-arm- Disclosed
- 30.08.2022
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-fcg8-mg9g-6hc4 - CC BY 4.0
Vulnerability history: Microsoft.AspNetCore.App.Runtime.linux-arm
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 25
- First → latest
- 05.2022 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 3
- High 19
- Medium 3
Disclosures per year
- 2022: 12
- 2023: 1
- 2024: 5
- 2025: 2
- 2026: 5
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.NET Denial of Service Vulnerability this entry
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