Skip to content
OpenAdvisories
High ALSA-2026:4456 2 CVEs

Important: .NET 9.0 security update

Published Mar 12, 2026 · Updated Oct 29, 2026

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 9.0.115 and .NET Runtime 9.0.14.Security Fix(es):

* .net: .NET: Denial of Service via out-of-bounds read (CVE-2026-26127)
* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)

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.

Fixed packages 14

ReleasePackageFixed in
AlmaLinux · 9 aspnetcore-runtime-9.0 9.0.14-1.el9_7
AlmaLinux · 9 aspnetcore-runtime-dbg-9.0 9.0.14-1.el9_7
AlmaLinux · 9 aspnetcore-targeting-pack-9.0 9.0.14-1.el9_7
AlmaLinux · 9 dotnet-apphost-pack-9.0 9.0.14-1.el9_7
AlmaLinux · 9 dotnet-hostfxr-9.0 9.0.14-1.el9_7
AlmaLinux · 9 dotnet-runtime-9.0 9.0.14-1.el9_7
AlmaLinux · 9 dotnet-runtime-dbg-9.0 9.0.14-1.el9_7
AlmaLinux · 9 dotnet-sdk-9.0 9.0.115-1.el9_7
AlmaLinux · 9 dotnet-sdk-9.0-source-built-artifacts 9.0.115-1.el9_7
AlmaLinux · 9 dotnet-sdk-aot-9.0 9.0.115-1.el9_7
AlmaLinux · 9 dotnet-sdk-dbg-9.0 9.0.115-1.el9_7
AlmaLinux · 9 dotnet-targeting-pack-9.0 9.0.14-1.el9_7
AlmaLinux · 9 dotnet-templates-9.0 9.0.115-1.el9_7
AlmaLinux · 9 netstandard-targeting-pack-2.1 9.0.115-1.el9_7

Vulnerabilities 2

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-26127
  • report
    https://access.redhat.com/security/cve/CVE-2026-26130
  • report
    https://bugzilla.redhat.com/2446098
  • report
    https://bugzilla.redhat.com/2446134
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-4456.html