medium5.9
CVE-2026-85790
Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
Impact
Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | Microsoft.Native.Quic.MsQuic.Schannel | >= 1.9.0, < 2.5.12 | 2.5.12 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows Server 2022 | from 10.0.20348.0 before 10.0.20348.5761 |
| Microsoft | Windows 11 Version 24H2 | from 10.0.26100.0 before 10.0.26100.9711 |
| Microsoft | Microsoft Visual Studio 2026 Version 18.10 | from 18.10.0 before 18.10.4 |
| Microsoft | Windows 11 Version 26H2 | from 10.0.26300.0 before 10.0.26300.9711 |
| Microsoft | Microsoft Visual Studio 2022 Version 17.14 | from 17.14.0 before 17.14.42 |
| Microsoft | Microsoft.Native.Quic.MsQuic.Schannel | from 1.9.0 before 2.6.2 |
| Microsoft | Windows 11 Version 26H1 | from 10.0.28000.0 before 10.0.28000.3231 |
| Microsoft | Windows 11 Version 23H2 | from 10.0.22631.0 before 10.0.22631.7652 |
| Microsoft | Windows Server 2025 (Server Core Installation) | from 10.0.26100.0 before 10.0.26100.33650 |
| Microsoft | Windows Server 2025 | from 10.0.26100.0 before 10.0.26100.33650 |
| Microsoft | Windows 11 Version 25H2 | from 10.0.26200.0 before 10.0.26200.9711 |
| Microsoft | Windows 11 23h2 | before 10.0.22631.7652 |
| Microsoft | Windows 11 24h2 | before 10.0.26100.9711 |
| Microsoft | Windows 11 25h2 | before 10.0.26200.9711 |
| Microsoft | Windows 11 26h1 | before 10.0.28000.3231 |
| Microsoft | Windows 11 26h2 | before 10.0.26300.9711 |
| Microsoft | Windows Server 2022 | before 10.0.20348.5761 |
| Microsoft | Windows Server 2025 | before 10.0.26100.33650 |
| Microsoft | Native.Quic.Msquic.Schannel | before 2.6.2 |
| Microsoft | Visual Studio 2022 | from 17.14.0 before 17.14.42 |
| Microsoft | Visual Studio 2026 | from 18.10.0 before 18.10.4 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-2mxg-prvg-9jfg
- https://github.com/dotnet/runtime/security/advisories/GHSA-2mxg-prvg-9jfg
- https://github.com/dotnet/announcements/issues/470
- https://github.com/dotnet/runtime/issues/135704
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85790