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 9.0.116 and .NET Runtime 9.0.15.Security Fix(es):
* dotnet: .NET: Security Bypass and Denial of Service Vulnerability (CVE-2026-26171)
* dotnet: .NET: Denial of Service via stack overflow (CVE-2026-32203)
* dotnet: .NET: Denial of Service via Infinite Recursion in XmlDecryptionTransform (CVE-2026-33116)
* dotnet: Dotnet: SMTP Command Injection and Header Injection via MailAddress parsing flaw (CVE-2026-32178)
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
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 10 | aspnetcore-runtime-9.0 | 9.0.15-1.el10_1 |
| AlmaLinux · 10 | aspnetcore-runtime-dbg-9.0 | 9.0.15-1.el10_1 |
| AlmaLinux · 10 | aspnetcore-targeting-pack-9.0 | 9.0.15-1.el10_1 |
| AlmaLinux · 10 | dotnet-apphost-pack-9.0 | 9.0.15-1.el10_1 |
| AlmaLinux · 10 | dotnet-hostfxr-9.0 | 9.0.15-1.el10_1 |
| AlmaLinux · 10 | dotnet-runtime-9.0 | 9.0.15-1.el10_1 |
| AlmaLinux · 10 | dotnet-runtime-dbg-9.0 | 9.0.15-1.el10_1 |
| AlmaLinux · 10 | dotnet-sdk-9.0 | 9.0.116-1.el10_1 |
| AlmaLinux · 10 | dotnet-sdk-9.0-source-built-artifacts | 9.0.116-1.el10_1 |
| AlmaLinux · 10 | dotnet-sdk-aot-9.0 | 9.0.116-1.el10_1 |
| AlmaLinux · 10 | dotnet-sdk-dbg-9.0 | 9.0.116-1.el10_1 |
| AlmaLinux · 10 | dotnet-targeting-pack-9.0 | 9.0.15-1.el10_1 |
| AlmaLinux · 10 | dotnet-templates-9.0 | 9.0.116-1.el10_1 |
| AlmaLinux · 10 | netstandard-targeting-pack-2.1 | 9.0.116-1.el10_1 |
Vulnerabilities 4
-
High 7.5
.NET Denial of Service Vulnerability
Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.
-
High 7.5
.NET Spoofing Vulnerability
Improper neutralization of special elements in .NET allows an unauthorized attacker to perform spoofing over a network.
-
High 7.5
.NET and Visual Studio Denial of Service Vulnerability
Stack-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to deny service over a network.
-
High 7.5
.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
Loop with unreachable exit condition ('infinite loop') in .NET, .NET Framework, Visual Studio allows an unauthorized attacker to deny service over a network.
References
-
report
https://access.redhat.com/security/cve/CVE-2026-26171
-
report
https://access.redhat.com/security/cve/CVE-2026-32178
-
report
https://access.redhat.com/security/cve/CVE-2026-32203
-
report
https://access.redhat.com/security/cve/CVE-2026-33116
-
report
https://bugzilla.redhat.com/2457739
-
report
https://bugzilla.redhat.com/2457740
-
report
https://bugzilla.redhat.com/2457741
-
report
https://bugzilla.redhat.com/2457781
-
advisory
https://errata.almalinux.org/10/ALSA-2026-8472.html