# CVE-2023-36435: Microsoft QUIC Denial of Service Vulnerability

CVE-2023-36435 is fixed in 9 products on 2 platforms, first by PowerShell Preview 7.4.0.1, released December 20, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-36435
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0572
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Oct 10, 2023
- Weakness: Uncontrolled Resource Consumption
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36435

## Description

Microsoft QUIC Denial of Service Vulnerability

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | .NET 7.0 |  | [KB5032875](https://patchblox.com/security/data/fix/microsoft/kb5032875.md) | Dec 12, 2023 |
| Microsoft | Windows 11 Version 22H2 for ARM64-based Systems | 22621.2428 | [KB5031354](https://patchblox.com/security/data/fix/microsoft/kb5031354.md) | Oct 10, 2023 |
| Microsoft | Windows 11 Version 22H2 for x64-based Systems | 22621.2428 | [KB5031354](https://patchblox.com/security/data/fix/microsoft/kb5031354.md) | Oct 10, 2023 |
| Microsoft | Windows 11 version 21H2 for ARM64-based Systems | 22000.2538 | [KB5031358](https://patchblox.com/security/data/fix/microsoft/kb5031358.md) | Oct 10, 2023 |
| Microsoft | Windows 11 version 21H2 for x64-based Systems | 22000.2538 | [KB5031358](https://patchblox.com/security/data/fix/microsoft/kb5031358.md) | Oct 10, 2023 |
| Microsoft | Windows Server 2022 | 20348.2031 | [KB5031364](https://patchblox.com/security/data/fix/microsoft/kb5031364.md) | Oct 10, 2023 |
| Microsoft | Windows Server 2022 (Server Core installation) | 20348.2031 | [KB5031364](https://patchblox.com/security/data/fix/microsoft/kb5031364.md) | Oct 10, 2023 |
| Windows apps | PowerShell | 7.3.9.0 | [PowerShell 7.3.9.0](https://patchblox.com/security/data/fix/windows-app/microsoft.powershell-7.3.9.0.md) | Oct 26, 2023 |
| Windows apps | PowerShell Preview | 7.4.0.1 | [PowerShell Preview 7.4.0.1](https://patchblox.com/security/data/fix/windows-app/microsoft.powershell.preview-7.4.0.1.md) | Dec 20, 2022 |

---

Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.