ASP.NET Core Kestrel in Microsoft .NET 8.0 before 8.0.22 and .NET 9.0 before 9.0.11 allows a remote attacker to cause excessive CPU consumption by sending a crafted QUIC packet, because of an incorrect exit condition for HTTP/3 Encoder/Decoder stream processing.
History

Wed, 25 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
Title Denial of Service via Crafted QUIC Packet in ASP.NET Core Kestrel

Tue, 24 Mar 2026 02:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 20 Mar 2026 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft
Microsoft aspnetcore
Vendors & Products Microsoft
Microsoft aspnetcore

Thu, 19 Mar 2026 18:45:00 +0000

Type Values Removed Values Added
Description ASP.NET Core Kestrel in Microsoft .NET 8.0 before 8.0.22 and .NET 9.0 before 9.0.11 allows a remote attacker to cause excessive CPU consumption by sending a crafted QUIC packet, because of an incorrect exit condition for HTTP/3 Encoder/Decoder stream processing.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-03-24T01:32:58.972Z

Reserved: 2026-02-04T00:00:00.000Z

Link: CVE-2026-25667

cve-icon Vulnrichment

Updated: 2026-03-24T01:32:53.058Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-19T19:16:19.880

Modified: 2026-03-24T02:16:04.377

Link: CVE-2026-25667

cve-icon Redhat

No data.