Bug 2550820 (CVE-2026-83520)

Summary:	CVE-2026-83520 dotnet: dotnet: Arbitrary code execution via untrusted data deserialization
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	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in .NET. An insecure deserialization vulnerability allows an unauthenticated remote attacker to achieve arbitrary code execution over a network. By convincing an application or user to process specially crafted serialized data, an attacker can execute malicious commands with the privileges of the affected application.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2026-10-13 19:23:37 UTC

Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.

Affected products:
- .NET Windows Desktop Runtime (release 11.0): 11.0.0-preview.1 - 11.0.0-rc.1; fixed 11.0.0-rc.2
- .NET Windows Desktop Runtime (release 8.0): 8.0.0 - 8.0.31; fixed 8.0.32
- .NET Windows Desktop Runtime (release 10.0): 10.0.0 - 10.0.12; fixed 10.0.13
- .NET Windows Desktop Runtime (release 9.0): 9.0.0 - 9.0.20; fixed 9.0.21