Bug 2568443 (CVE-2026-109475)

Summary:	CVE-2026-109475 dotnet8.0: dotnet9.0: dotnet11.0: dotnet10.0: .NET Denial of Service Vulnerability
Product:	[Other] Security Response	Reporter:	Charles Timko <ctimko>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	rhel-process-autobot, security-response-team, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	Stack-based buffer overflow in .NET allows an unauthorized attacker to deny service over a network.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Deadline:	2026-11-10

Description Charles Timko 2026-11-06 18:58:42 UTC

Managed HttpListener can recursively process an unterminated request line and exhaust the process stack.

CNA: microsoft
CNA impact: Denial of Service
CWE: CWE-121
Platforms: linux
Architectures: all
CVSS 3.1: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Affected products:
- .NET Runtime Libraries (release 8.0): 8.0.0 - 8.0.33; fixed 8.0.34
- .NET Runtime Libraries (release 9.0): 9.0.0 - 9.0.22; fixed 9.0.23
- .NET Runtime Libraries (release 11.0): 11.0.0-preview.1.26104.118 - 11.0.0-rc.3.26522.148; fixed 11.0.0
- .NET Runtime Libraries (release 10.0): 10.0.0 - 10.0.14; fixed 10.0.15