AlmaLinux alert ALSA-2026:41895 (.NET 9.0)

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[Announce] [Security Advisory] ALSA-2026:41895: .NET 9.0 security, bug fix, and enhancement update (Important)
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Fri, 31 Jul 2026 16:20:21 +0000
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<0100019fb8fa0835-6d50e9ee-a3ea-4554-842c-fcd4cd64a462-000000@email.amazonses.com>
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Article
Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata
notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-07-31

Summary:

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several
new APIs, and it includes a CLR implementation.  

New versions of .NET that address a security vulnerability are now available. The updated versions
are .NET SDK 9.0.119 and .NET Runtime 9.0.18.  

Security Fix(es):  

  * dotnet: SocketsHttpHandler Http2Connection - HTTP/2 SETTINGS/PING ACK flood causing OOM
(CVE-2026-50651)
  * dotnet: .NET Core: Denial of Service via type confusion (CVE-2026-57108)
  * ASP.NET Core: ASP.NET Core: Denial of Service via uncontrolled resource allocation
(CVE-2026-56170)
  * ASP.NET Core: ASP.NET Core: Privilege Escalation via Incorrect Authentication Algorithm
(CVE-2026-47300)
  * ASP.NET Core: ASP.NET Core: Privilege Elevation via Authentication Bypass (CVE-2026-47303)
  * dotnet: .NET Security Feature Bypass Vulnerability (CVE-2026-47304)
  * dotnet: .NET: Denial of Service vulnerability due to uncontrolled resource allocation
(CVE-2026-47302)
  * dotnet: .NET Framework: Privilege escalation via code injection (CVE-2026-50650)
  * dotnet: .NET: Security feature bypass due to incorrect authorization (CVE-2026-50528)
  * dotnet: .NET: Local code execution via deserialization of untrusted data (CVE-2026-50649)
  * dotnet: .NET: Local tampering via improper link resolution (CVE-2026-50526)
  * dotnet: .NET Framework: Local Code Execution via Protection Mechanism Failure
(CVE-2026-50646)
  * dotnet: .NET Framework: Denial of Service via network-based buffer overflow (CVE-2026-50527)
  * dotnet: .NET Framework: Remote Denial of Service due to uncontrolled resource allocation
(CVE-2026-50648)
  * .NET: .NET: Network Spoofing Vulnerability (CVE-2026-50659)
  * dotnet: .NET Framework: Denial of Service via improper input validation (CVE-2026-50524)


Bug Fix(es) and Enhancement(s):  

  * Update .NET 9.0 to SDK 9.0.119 and Runtime 9.0.18 [almalinux-10.2.z] (JIRA:AlmaLinux-192473)
  * dotnet9.0: Reduce time to detect hanging builds during .NET RPM builds (c10s)
[almalinux-10.2.z] (JIRA:AlmaLinux-192330)


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.


Full details, updated packages, references, and other related information:
https://errata.almalinux.org/10/ALSA-2026-41895.html

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Kind regards,
AlmaLinux Team
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