---
id: CVE-2022-21986
title: .NET Denial of Service Vulnerability
summary: .NET Denial of Service Vulnerability
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: microsoft
product: .net
affected:
  - '.net >= 5.0, < 5.0.14'
  - '.net >= 6.0.0, < 6.0.2'
  - 'visual_studio_2019 >= 8.10, < 8.10.18'
  - 'visual_studio_2019 >= 16.0, <= 16.11'
  - 'visual_studio_2022 >= 17.0, < 17.0.6'
  - fedora = 34
  - fedora = 35
patched:
  - .net 6.0.2
  - visual_studio_2019 8.10.18
  - visual_studio_2022 17.0.6
published: '2022-02-09'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:17:16.133'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-21986'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21986'
    label: secure@microsoft.com
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21986'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-21986.json
  - url: 'https://access.redhat.com/security/cve/CVE-2022-21986'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2051490'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2022-21986'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2022-21986'
  - url: 'https://github.com/dotnet/announcements/issues/207'
  - url: 'https://access.redhat.com/errata/RHSA-2022:0499'
  - url: 'https://access.redhat.com/errata/RHSA-2022:0500'
  - url: 'https://access.redhat.com/errata/RHSA-2022:0495'
  - url: 'https://access.redhat.com/errata/RHSA-2022:0496'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.03739
epssPercentile: 0.89559
ingestedAt: '2026-10-08T23:16:47.330Z'
cwe:
  - CWE-770
---

## Overview

.NET Denial of Service Vulnerability

## Affected

- `.net >= 5.0, < 5.0.14`
- `.net >= 6.0.0, < 6.0.2`
- `visual_studio_2019 >= 8.10, < 8.10.18`
- `visual_studio_2019 >= 16.0, <= 16.11`
- `visual_studio_2022 >= 17.0, < 17.0.6`
- `fedora = 34`
- `fedora = 35`

## Remediation

Upgrade past the affected range:

- `.net 6.0.2`
- `visual_studio_2019 8.10.18`
- `visual_studio_2022 17.0.6`

## Vendor advisories

- **RHSA-2022:0499** · Red Hat · fixed in: .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7), .NET Core on Red Hat Enterprise Linux Server (v. 7), .NET Core on Red Hat Enterprise Linux Workstation (v. 7) · released 2022-02-09 · [advisory](https://access.redhat.com/errata/RHSA-2022:0499)
- **RHSA-2022:0500** · Red Hat · fixed in: .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7), .NET Core on Red Hat Enterprise Linux Server (v. 7), .NET Core on Red Hat Enterprise Linux Workstation (v. 7) · released 2022-02-09 · [advisory](https://access.redhat.com/errata/RHSA-2022:0500)
- **RHSA-2022:0495** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat CodeReady Linux Builder (v. 8) · released 2022-02-09 · [advisory](https://access.redhat.com/errata/RHSA-2022:0495)
- **RHSA-2022:0496** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2022-02-09 · [advisory](https://access.redhat.com/errata/RHSA-2022:0496)