RHSA-2026:55857 — Security Advisory

An update for .NET 10.0 is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

.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: 10.0.111 Runtime version: 10.0.11

Security Fix(es):

• .NET: .NET Core: .NET Security Feature Bypass Vulnerability (CVE-2026-62899)

• .NET: .NET Information Disclosure Vulnerability (CVE-2026-62900)

• .NET: .NET Denial of Service Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 10.0 to SDK 10.0.111 and Runtime 10.0.11 [rhel-9.8.z] (JIRA:RHEL-235481)

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.