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ALSA-2025:8812 — Important: .NET 8.0 security update

Affected: AlmaLinux:8: aspnetcore-runtime-8.0, AlmaLinux:8: aspnetcore-runtime-dbg-8.0, AlmaLinux:8: aspnetcore-targeting-pack-8.0, AlmaLinux:8: dotnet-apphost-pack-8.0, AlmaLinux:8: dotnet-hostfxr-8.0, AlmaLinux:8: dotnet-runtime-8.0, AlmaLinux:8: dotnet-runtime-dbg-8.0, AlmaLinux:8: dotnet-sdk-8.0, AlmaLinux:8: dotnet-sdk-8.0-source-built-artifacts, AlmaLinux:8: dotnet-sdk-dbg-8.0 and 2 more

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.117 and .NET Runtime 8.0.17.Security Fix(es):

* dotnet: .NET Remote Code Vulnerability (CVE-2025-30399)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2025-07085

BELL-CVE-2025-30399

Affected: Alpaquita:stream: dotnet8-runtime

BIT-dotnet-2025-30399 — .NET and Visual Studio Remote Code Execution Vulnerability

Affected: Bitnami: dotnet

Untrusted search path in .NET and Visual Studio allows an unauthorized attacker to execute code over a network.

certfr-2025-avi-0500 — Une vulnérabilité a été découverte dans Microsoft .Net. Elle permet à un attaquant de provoquer une exécution de code a…

certfr-2025-avi-0500

EUVD-2026-268983

fkie_cve-2025-30399

Untrusted search path in .NET and Visual Studio allows an unauthorized attacker to execute code over a network.

GHSA-266m-wp2v-x7mq — Microsoft Security Advisory CVE-2025-30399 | .NET Remote Code Vulnerability

Affected: NuGet: Microsoft.NetCore.App.Runtime.linux-arm, NuGet: Microsoft.NetCore.App.Runtime.linux-arm64, NuGet: Microsoft.NetCore.App.Runtime.linux-musl-arm, NuGet: Microsoft.NetCore.App.Runtime.linux-musl-arm64, NuGet: Microsoft.NetCore.App.Runtime.linux-musl-x64, NuGet: Microsoft.NetCore.App.Runtime.linux-x64, NuGet: Microsoft.NetCore.App.Runtime.osx-arm64, NuGet: Microsoft.NetCore.App.Runtime.osx-x64, NuGet: Microsoft.NetCore.App.Runtime.win-arm, NuGet: Microsoft.NetCore.App.Runtime.win-arm64 and 2 more

# Microsoft Security Advisory CVE-2025-30399 | .NET Remote Code Vulnerability

## <a name="executive-summary"></a>Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0 and .NET 9.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

An attacker could exploit this vulnerability by placing files in particular locations, leading to unintended code execution.

## Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/362

## <a name="mitigation-factors"></a>Mitigation factors

Microsoft has not identified any mitigating factors for this vulnerability.

## <a name="affected-software"></a>Affected software

* Any .NET 8.0 application running on .NET 8.0.16 or earlier. * Any .NET 9.0 application running on .NET 9.0.5 or earlier.

## <a name="affected-packages"></a>Affected Packages The vulnerability affects any Microsoft .NET project if it uses any of affected packages versions listed below

### <a name=".NET 9"></a>.NET 9 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 9.0.0, <= 9.0.5 | 9.0.6 [Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-a…

msrc_CVE-2025-30399 — .NET and Visual Studio Remote Code Execution Vulnerability

msrc_CVE-2025-30399

RHSA-2025:8812 — Red Hat Security Advisory: .NET 8.0 security update

dotnet: .NET Remote Code Vulnerability

RHSA-2025:8814 — Red Hat Security Advisory: .NET 8.0 security update

dotnet: .NET Remote Code Vulnerability

UBUNTU-CVE-2025-30399

Affected: Ubuntu:22.04:LTS: dotnet7, Ubuntu:22.04:LTS: dotnet8, Ubuntu:24.04:LTS: dotnet8

Untrusted search path in .NET and Visual Studio allows an unauthorized attacker to execute code over a network.

WID-SEC-W-2025-1274 — Microsoft Developer Tools: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft Visual Studio 2022, Microsoft WIndows SDK und Microsoft .NET Framework ausnutzen, um beliebigen Programmcode auszuführen, und um seine Privilegien zu erhöhen.