# RHSA-2021:0474: Security update for 4 packages

RHSA-2021:0474, released February 10, 2021, fixes 1 CVE across 4 products. None of them is reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2021-0474
- Platform: Linux
- Released: Feb 10, 2021
- Priority: Routine (Closes CVE-2021-1721)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2021:0474

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [dotnet-host-fxr-2.1](https://patchblox.com/security/data/product/linux/dotnet-host-fxr-2.1.md) | RHEL 8 | 0:2.1.25-1.el8_3 |
| [dotnet-runtime-2.1](https://patchblox.com/security/data/product/linux/dotnet-runtime-2.1.md) | RHEL 8 | 0:2.1.25-1.el8_3 |
| [dotnet-sdk-2.1](https://patchblox.com/security/data/product/linux/dotnet-sdk-2.1.md) | RHEL 8 | 0:2.1.521-1.el8_3 |
| [dotnet-sdk-2.1.5xx](https://patchblox.com/security/data/product/linux/dotnet-sdk-2.1.5xx.md) | RHEL 8 | 0:2.1.521-1.el8_3 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-1721](https://patchblox.com/security/data/cve/CVE-2021-1721.md) | Routine | .NET Core and Visual Studio Denial of Service Vulnerability | 6.5 | 0.0334 | Disclosed |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo