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GHSA-92f5-vc22-8j33

CriticalCVSS 9.8 / 10
Published Sep 8, 2026·Last modified Sep 8, 2026
Affected Components(4)
NuGet logoMicrosoft.Native.Quic.MsQuic.Schannel
< 2.4.19
NuGet logoMicrosoft.Native.Quic.MsQuic.Schannel
2.5.3 – 2.5.10
NuGet logoMicrosoft.Native.Quic.MsQuic.OpenSSL
< 2.4.19
1 / 2
Description

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

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.

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Risk Scores
Base Score
9.8

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
9.0

Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2026-62815
    Alias
  • EUVD-2026-56392
    Alias
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