.NET 8.0 Security Update — AlmaLinux 8 (ALSA-2026:86594)

ALSA-2026:86594 is a large .NET 8.0 security update for AlmaLinux 8, fixing 21 CVEs (CVE-2026-58280, CVE-2026-66822, CVE-2026-69651 and the CVE-2026-701xx / CVE-2026-962xx series among others). Update the dotnet packages: dnf update dotnet* and restart .NET 8 applications so they run the patched runtime.

Critical 7.5 CVSS 2026-11-02

AlmaLinux 8

प्रभावित संस्करण

8.0

SharedLicense लाइसेंस के तहत इसका अर्थ

.NET 8 powers production web APIs and services — a 21-CVE batch in the runtime itself touches the parsing, networking and crypto layers every application on the server relies on.

.NET is a fast, lightweight and modular platform for creating cross platform applications that work on Linux, macOS and Windows. It particularly focuses on creating console applications, web applications and micro-services. .NET contains a runtime conforming to .NET Standards a set of framework libraries, an SDK containing compilers and a 'dotnet' application to drive everything.  

SDK version: 8.0.132  
Runtime version: 8.0.32  

Security Fix(es):  

  * dotnet10.0: dotnet9.0: dotnet: dotnet8.0: .NET Denial of Service Vulnerability (CVE-2026-58280)
  * dotnet10.0: dotnet8.0: dotnet9.0: dotnet: .NET Information Disclosure Vulnerability (CVE-2026-66822)
  * dotnet9.0: dotnet: dotnet10.0: dotnet8.0: .NET Denial of Service Vulnerability (CVE-2026-69651)
  * dotnet8.0: dotnet10.0: dotnet: dotnet9.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-70159)
  * dotnet10.0: dotnet8.0: dotnet9.0: ASP.NET Core Elevation of Privilege Vulnerability (CVE-2026-70175)
  * dotnet10.0: dotnet8.0: dotnet9.0: ASP.NET Core Elevation of Privilege Vulnerability (CVE-2026-70179)
  * dotnet9.0: dotnet8.0: dotnet10.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-70181)
  * dotnet: dotnet10.0: dotnet9.0: dotnet8.0: ASP.NET Core Elevation of Privilege Vulnerability (CVE-2026-70183)
  * dotnet10.0: dotnet9.0: dotnet8.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-70186)
  * dotnet: ASP.NET Core Security Feature Bypass Vulnerability (CVE-2026-70188)
  * dotnet9.0: dotnet8.0: dotnet10.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-70196)
  * dotnet: ASP.NET Core Tampering Vulnerability (CVE-2026-88092)
  * dotnet10.0: dotnet8.0: dotnet9.0: dotnet: MessagePack: Nested arrays can blow past buffer length limits (CVE-2026-92707)
  * dotnet8.0: Active Directory Federation Services (AD FS) Spoofing Vulnerability (CVE-2026-96222)
  * dotnet: dotnet8.0: dotnet9.0: dotnet10.0: .NET Elevation of Privilege Vulnerability (CVE-2026-96225)
  * dotnet9.0: dotnet10.0: dotnet8.0: dotnet: ASP.NET Core Remote Code Execution Vulnerability (CVE-2026-96230)
  * dotnet: dotnet9.0: dotnet10.0: dotnet8.0: .NET Elevation of Privilege Vulnerability (CVE-2026-96231)
  * dotnet10.0: dotnet: dotnet8.0: dotnet9.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-96233)
  * dotnet: dotnet10.0: dotnet9.0: dotnet8.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-96236)
  * dotnet8.0: dotnet10.0: dotnet9.0: .NET Remote Code Execution Vulnerability (CVE-2026-96237)
  * dotnet8.0: dotnet10.0: dotnet9.0: dotnet: .NET Security Feature Bypass Vulnerability (CVE-2026-96238)


Bug Fix(es) and Enhancement(s):  

  * Update .NET 8.0 to SDK 8.0.132 and Runtime 8.0.32 (JIRA:AlmaLinux-277790)


For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

अक्सर पूछे जाने वाले प्रश्न

What is ALSA-2026:86594?

It is AlmaLinux's .NET 8.0 security erratum, fixing 21 CVEs across the .NET runtime and base libraries — including the CVE-2026-701xx, CVE-2026-962xx and CVE-2026-58280/66822/69651 series.

Who is affected?

AlmaLinux 8 servers with .NET 8.0 packages installed — ASP.NET Core applications, microservices and .NET console tooling.

How do I apply the fix?

Run dnf update dotnet* and restart your .NET 8 applications so they run the patched runtime; verify the package versions match the erratum.

Is this related to the earlier .NET Ubuntu notice?

They are separate vendor deliveries — Ubuntu shipped its .NET fixes in USN-8958-1, AlmaLinux in this erratum. Both close flaws in the same upstream .NET codebase; apply per platform installed.

संदर्भ

सुरक्षा सलाह

अपने सिस्टम में भेद्यताओं की जाँच करें

अपना उत्पाद और ऑपरेटिंग सिस्टम चुनें ताकि आपके लिए लागू सटीक फिक्स कमांड देख सकें।

अपना सिस्टम जाँचें

अक्सर पूछे जाने वाले प्रश्न

संबंधित सलाह

अपने सिस्टम में भेद्यताओं की जाँच करें