# CVE-2025-21171: .NET Remote Code Execution Vulnerability

CVE-2025-21171 is fixed in 24 products on 3 platforms, first by RHBA-2025:0305, released January 14, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-21171
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0172
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Jan 14, 2025
- Weakness: Heap-based Buffer Overflow
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21171

## Description

.NET Remote Code Execution Vulnerability

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | .NET 9.0 runtime installed on Linux |  | [KB5050526](https://patchblox.com/security/data/fix/microsoft/kb5050526.md) | Jan 14, 2025 |
| Microsoft | .NET 9.0 runtime installed on Mac OS |  | [KB5050526](https://patchblox.com/security/data/fix/microsoft/kb5050526.md) | Jan 14, 2025 |
| Microsoft | .NET 9.0 runtime installed on Windows |  | [KB5050526](https://patchblox.com/security/data/fix/microsoft/kb5050526.md) | Jan 14, 2025 |
| Windows apps | PowerShell | 7.5.1.0 | [PowerShell 7.5.1.0](https://patchblox.com/security/data/fix/windows-app/microsoft.powershell-7.5.1.0.md) | Apr 24, 2025 |
| Linux | aspnetcore-runtime-9.0 RHEL 8 | 0:9.0.1-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | aspnetcore-runtime-9.0 RHEL 9 | 0:9.0.1-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | aspnetcore-runtime-9.0 Ubuntu 24.10 (oracular) | 9.0.1-0ubuntu1~24.10.1 | [aspnetcore-runtime-9.0 9.0.1-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-aspnetcore-runtime-9.0-9.0.1-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | aspnetcore-runtime-9.0 almalinux 8 | 9.0.1-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | aspnetcore-runtime-9.0 ol 8 | 0:9.0.1-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | aspnetcore-runtime-dbg-9.0 RHEL 8 | 0:9.0.1-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | aspnetcore-runtime-dbg-9.0 RHEL 9 | 0:9.0.1-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | aspnetcore-runtime-dbg-9.0 almalinux 8 | 9.0.1-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | aspnetcore-runtime-dbg-9.0 ol 8 | 0:9.0.1-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | aspnetcore-targeting-pack-9.0 RHEL 8 | 0:9.0.1-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | aspnetcore-targeting-pack-9.0 RHEL 9 | 0:9.0.1-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | aspnetcore-targeting-pack-9.0 Ubuntu 24.10 (oracular) | 9.0.1-0ubuntu1~24.10.1 | [aspnetcore-targeting-pack-9.0 9.0.1-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-aspnetcore-targeting-pack-9.0-9.0.1-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | aspnetcore-targeting-pack-9.0 almalinux 8 | 9.0.1-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | aspnetcore-targeting-pack-9.0 ol 8 | 0:9.0.1-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet RHEL 8 | 0:9.0.102-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet almalinux 8 | 9.0.102-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet ol 8 | 0:9.0.102-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-apphost-pack-9.0 RHEL 8 | 0:9.0.1-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-apphost-pack-9.0 RHEL 9 | 0:9.0.1-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-apphost-pack-9.0 Ubuntu 24.10 (oracular) | 9.0.1-0ubuntu1~24.10.1 | [dotnet-apphost-pack-9.0 9.0.1-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet-apphost-pack-9.0-9.0.1-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet-apphost-pack-9.0 almalinux 8 | 9.0.1-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-apphost-pack-9.0 ol 8 | 0:9.0.1-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-host RHEL 8 | 0:9.0.1-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-host RHEL 9 | 0:9.0.1-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-host almalinux 8 | 9.0.1-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-host ol 8 | 0:9.0.1-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-host-9.0 Ubuntu 24.10 (oracular) | 9.0.1-0ubuntu1~24.10.1 | [dotnet-host-9.0 9.0.1-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet-host-9.0-9.0.1-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet-hostfxr-9.0 RHEL 8 | 0:9.0.1-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-hostfxr-9.0 RHEL 9 | 0:9.0.1-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-hostfxr-9.0 Ubuntu 24.10 (oracular) | 9.0.1-0ubuntu1~24.10.1 | [dotnet-hostfxr-9.0 9.0.1-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet-hostfxr-9.0-9.0.1-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet-hostfxr-9.0 almalinux 8 | 9.0.1-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-hostfxr-9.0 ol 8 | 0:9.0.1-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-runtime-9.0 RHEL 8 | 0:9.0.1-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-runtime-9.0 RHEL 9 | 0:9.0.1-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-runtime-9.0 Ubuntu 24.10 (oracular) | 9.0.1-0ubuntu1~24.10.1 | [dotnet-runtime-9.0 9.0.1-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet-runtime-9.0-9.0.1-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet-runtime-9.0 almalinux 8 | 9.0.1-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-runtime-9.0 ol 8 | 0:9.0.1-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-runtime-dbg-9.0 RHEL 8 | 0:9.0.1-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-runtime-dbg-9.0 RHEL 9 | 0:9.0.1-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-runtime-dbg-9.0 almalinux 8 | 9.0.1-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-runtime-dbg-9.0 ol 8 | 0:9.0.1-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-sdk-9.0 RHEL 8 | 0:9.0.102-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-sdk-9.0 RHEL 9 | 0:9.0.102-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-sdk-9.0 Ubuntu 24.10 (oracular) | 9.0.102-0ubuntu1~24.10.1 | [dotnet-sdk-9.0 9.0.102-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet-sdk-9.0-9.0.102-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet-sdk-9.0 almalinux 8 | 9.0.102-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-sdk-9.0 ol 8 | 0:9.0.102-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-sdk-9.0-source-built-artifacts RHEL 8 | 0:9.0.102-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-sdk-9.0-source-built-artifacts RHEL 9 | 0:9.0.102-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-sdk-9.0-source-built-artifacts Ubuntu 24.10 (oracular) | 9.0.102-0ubuntu1~24.10.1 | [dotnet-sdk-9.0-source-built-artifacts 9.0.102-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet-sdk-9.0-source-built-artifacts-9.0.102-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet-sdk-9.0-source-built-artifacts almalinux 8 | 9.0.102-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-sdk-9.0-source-built-artifacts ol 8 | 0:9.0.102-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-sdk-aot-9.0 RHEL 8 | 0:9.0.102-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-sdk-aot-9.0 RHEL 9 | 0:9.0.102-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-sdk-aot-9.0 Ubuntu 24.10 (oracular) | 9.0.102-0ubuntu1~24.10.1 | [dotnet-sdk-aot-9.0 9.0.102-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet-sdk-aot-9.0-9.0.102-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet-sdk-aot-9.0 almalinux 8 | 9.0.102-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-sdk-aot-9.0 ol 8 | 0:9.0.102-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-sdk-dbg-9.0 RHEL 8 | 0:9.0.102-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-sdk-dbg-9.0 RHEL 9 | 0:9.0.102-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-sdk-dbg-9.0 almalinux 8 | 9.0.102-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-sdk-dbg-9.0 ol 8 | 0:9.0.102-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-targeting-pack-9.0 RHEL 8 | 0:9.0.1-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-targeting-pack-9.0 RHEL 9 | 0:9.0.1-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-targeting-pack-9.0 Ubuntu 24.10 (oracular) | 9.0.1-0ubuntu1~24.10.1 | [dotnet-targeting-pack-9.0 9.0.1-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet-targeting-pack-9.0-9.0.1-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet-targeting-pack-9.0 almalinux 8 | 9.0.1-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-targeting-pack-9.0 ol 8 | 0:9.0.1-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet-templates-9.0 RHEL 8 | 0:9.0.102-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-templates-9.0 RHEL 9 | 0:9.0.102-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | dotnet-templates-9.0 Ubuntu 24.10 (oracular) | 9.0.102-0ubuntu1~24.10.1 | [dotnet-templates-9.0 9.0.102-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet-templates-9.0-9.0.102-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet-templates-9.0 almalinux 8 | 9.0.102-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | dotnet-templates-9.0 ol 8 | 0:9.0.102-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | dotnet9 Ubuntu 24.10 (oracular) | 9.0.102-9.0.1-0ubuntu1~24.10.1 | [dotnet9 9.0.102-9.0.1-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-dotnet9-9.0.102-9.0.1-0ubuntu1-24.10.1.md) | Jan 15, 2025 |
| Linux | dotnet9.0 rocky 8 | 0:9.0.102-1.el8_10 | [RLSA-2025:0382](https://patchblox.com/security/data/fix/linux/rlsa-2025-0382.md) | Feb 13, 2025 |
| Linux | netstandard-targeting-pack-2.1 RHEL 8 | 0:9.0.102-1.el8_10 | [RHSA-2025:0382](https://patchblox.com/security/data/fix/linux/rhsa-2025-0382.md) | Jan 16, 2025 |
| Linux | netstandard-targeting-pack-2.1 RHEL 9 | 0:9.0.102-1.el9_5 | [RHBA-2025:0305](https://patchblox.com/security/data/fix/linux/rhba-2025-0305.md) | Jan 14, 2025 |
| Linux | netstandard-targeting-pack-2.1 almalinux 8 | 9.0.102-1.el8_10 | [ALSA-2025:0382](https://patchblox.com/security/data/fix/linux/alsa-2025-0382.md) | Jan 16, 2025 |
| Linux | netstandard-targeting-pack-2.1 ol 8 | 0:9.0.102-1.0.1.el8_10 | [ELSA-2025-0382](https://patchblox.com/security/data/fix/linux/elsa-2025-0382.md) | Jan 17, 2025 |
| Linux | netstandard-targeting-pack-2.1-9.0 Ubuntu 24.10 (oracular) | 9.0.102-0ubuntu1~24.10.1 | [netstandard-targeting-pack-2.1-9.0 9.0.102-0ubuntu1~24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-netstandard-targeting-pack-2.1-9.0-9.0.102-0ubuntu1-24.10.1.md) | Jan 15, 2025 |

---

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