Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

Affected: NuGet: Microsoft.Native.Quic.MsQuic.OpenSSL, NuGet: Microsoft.Native.Quic.MsQuic.Schannel

# Summary Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

# Details

New network path creations and removals triggered by incoming packets can lead to a pointer invalidation.

## Patches

- Guard path promotion [e0f55b5](https://github.com/microsoft/msquic/commit/e0f55b5fdc9fff0b4465976d066ebd22fb7e2b3b)

# Impact

An unauthenticated attacker could exploit this vulnerability by sending a specially crafted packet to an affected service over the network. Successful exploitation could allow the attacker to execute code on the target system. No authentication or user interaction is required.

Ein Angreifer kann mehrere Schwachstellen in Microsoft Windows Server 2012, Microsoft Windows Server 2012 R2, Microsoft Windows Server 2016, Microsoft Windows 10, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Exchange, Microsoft Windows 11, Microsoft Windows Server 2025 und Microsoft Windows ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, und um Sicherheitsvorkehrungen zu umgehen.