GHSA-92f5-vc22-8j33
Microsoft QUIC: Remote Code Execution Vulnerability
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| NuGet | Microsoft.Native.Quic.MsQuic.OpenSSL | >= 2.5.3, < 2.5.10 | 2.5.10 |
| NuGet | Microsoft.Native.Quic.MsQuic.Schannel | >= 2.5.3, < 2.5.10 | 2.5.10 |
| NuGet | Microsoft.Native.Quic.MsQuic.OpenSSL | < 2.4.19 | 2.4.19 |
| NuGet | Microsoft.Native.Quic.MsQuic.Schannel | < 2.4.19 | 2.4.19 |
Details
As written in the advisory (Markdown source, shown as plain text).
# 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.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/microsoft/msquic/security/advisories/GHSA-92f5-vc22-8j33
- https://nvd.nist.gov/vuln/detail/CVE-2026-62815
- https://github.com/microsoft/msquic/pull/6217
- https://github.com/microsoft/msquic/pull/6219
- https://github.com/microsoft/msquic/pull/6220
- https://github.com/microsoft/msquic/commit/583e7d5b509bb0bfa3518482d98879b6eda41ad0
- https://github.com/microsoft/msquic/commit/9ff06b71fd4b4d5258361598ada5b24cbc1beb20
- https://github.com/microsoft/msquic/commit/e0f55b5fdc9fff0b4465976d066ebd22fb7e2b3b
- https://github.com/microsoft/msquic
- https://github.com/microsoft/msquic/releases/tag/v2.4.19
- https://github.com/microsoft/msquic/releases/tag/v2.5.10
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62815