Bug 2550920 (CVE-2026-96959)

Summary:	CVE-2026-96959 dotnet: .NET: Denial of Service via unthrottled resource allocation
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in .NET. An unauthenticated remote attacker can exploit improper resource allocation and a lack of rate limiting over the network to exhaust system resources. This flaw leads to a Denial of Service (DoS), causing the affected application or service to become unavailable to legitimate users.	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:
Bug Depends On:	2559918, 2559919, 2559917
Bug Blocks:

Description OSIDB Bzimport 2026-10-13 19:41:28 UTC

Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a network.

Affected packages:
- System.Security.Cryptography.Xml (release 11.0): 11.0.0-preview.1 - 11.0.0-rc.1; fixed 11.0.0-rc.2
- System.Security.Cryptography.Xml (release 10.0): 10.0.0 - 10.0.12; fixed 10.0.13
- System.Security.Cryptography.Xml (release 9.0): 9.0.0 - 9.0.20; fixed 9.0.21
- System.Security.Cryptography.Xml (release 8.0): 8.0.0 - 8.0.4; fixed 8.0.5