Bug 2548813 (CVE-2026-96957)

Summary:	CVE-2026-96957 dotnet10.0: dotnet: .NET Security Feature Bypass 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:	Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature 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:	2026-10-13

Description Charles Timko 2026-10-09 20:05:27 UTC

Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.

Affected products:
- .NET SDK (release 10.0): 10.0.400 - 10.0.401; fixed 10.0.402
- .NET SDK (release 10.0): 10.0.100 - 10.0.112; fixed 10.0.113
- .NET SDK (release 11.0): 11.0.100-preview.1 - 11.0.100-rc.1; fixed 11.0.100-rc.2

Comment 1 Jon Orris 2026-10-20 21:40:48 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:86195 https://access.redhat.com/errata/RHSA-2026:86195

Comment 2 Jon Orris 2026-10-20 21:58:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:86192 https://access.redhat.com/errata/RHSA-2026:86192

Comment 3 Jon Orris 2026-10-20 22:55:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:86193 https://access.redhat.com/errata/RHSA-2026:86193