RHSA-2021:3148 — Security Advisory
Red Hat Security Advisory: .NET 5.0 security and bugfix update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · August 12, 2021
Updated · October 8, 2026
Topic
An update for .NET 5.0 is now available for Red Hat Enterprise Linux 8.
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.
Description
.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 security vulnerabilities are now available. The updated versions are .NET SDK 5.0.206 and .NET Runtime 5.0.9.
Security Fix(es):
-
dotnet: ASP.NET Core WebSocket frame processing DoS (CVE-2021-26423)
-
dotnet: Dump file created world-readable (CVE-2021-34485)
-
dotnet: ASP.NET Core JWT token logging (CVE-2021-34532)
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.