Description
Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | .NET 10.0 runtime | 10.0.0 – < 10.0.14 | 10.0.14 |
| Microsoft | .NET 11.0 runtime | 11.0.0 – < 11.0.0-rc.2.26504.105 | 11.0.0-rc.2.26504.105 |
| Microsoft | .NET 8.0 runtime | 8.0.0 – < 8.0.32 | 8.0.32 |
| Microsoft | .NET 9.0 runtime | 9.0.0 – < 9.0.21 | 9.0.21 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – < 17.14.42 | 17.14.42 |
| Microsoft | Microsoft Visual Studio 2026 version 18.10 | 18.10.0 – < 18.10.4 | 18.10.4 |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 – < 10.0.22631.7652 | 10.0.22631.7652 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – < 10.0.26100.9711 | 10.0.26100.9711 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – < 10.0.26200.9711 | 10.0.26200.9711 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 – < 10.0.28000.3231 | 10.0.28000.3231 |
| Microsoft | Windows 11 Version 26H2 | 10.0.26300.0 – < 10.0.26300.9711 | 10.0.26300.9711 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – < 10.0.20348.5761 | 10.0.20348.5761 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – < 10.0.26100.33650 | 10.0.26100.33650 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – < 10.0.26100.33650 | 10.0.26100.33650 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | dotnet7 | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet10-runtime | 10.0.13-r0 | — |
| Alpine v3.24 | dotnet8-runtime | 8.0.32-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.21-r0 | — |
| Alpine v3.23 | dotnet10-runtime | 10.0.13-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.32-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.21-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.32-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.21-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
LHeiakim/CVE-2026-105016-RCE-PoC ★ 0 · Nov 11, 2026
CVE-2026-105016 - Blind RCE in msquic (QuicStreamSendWrite uint16 underflow) - CVSS 9.8
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| NuGet | Microsoft.Native.Quic.MsQuic.Schannel | >= 2.5.11-ci.156755675, < 2.5.11-ci.159417053 | 2.5.11-ci.159417053 | GHSA-5gjq-3f94-rcf7 |
Advisories 4
- WID-SEC-2026-3892 Microsoft Windows und Windows Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- WID-SEC-2026-3893 Microsoft Entwicklerwerkzeuge: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 4, 2026
- NCSC-2026-0423 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Oct 13, 2026
- MSRC-CVE-2026-105016 Microsoft QUIC Remote Code Execution Vulnerability Microsoft Security Response Center · Oct 13, 2026
References
- Microsoft QUIC Remote Code Execution Vulnerability vendor-advisory patch