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 9.0.118 and .NET Runtime 9.0.17.Security Fix(es):
* dotnet: .NET: Local file tampering via link following vulnerability (CVE-2026-45491)
* dotnet: ASP.NET Core: Denial of Service via uncontrolled resource consumption (CVE-2026-45591)
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 1
| Release | Package | Fixed in |
|---|---|---|
| Rocky Linux · 9 | dotnet9.0 | 0:9.0.118-1.el9_8 |
Vulnerabilities 2
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High 7.5
ASP.NET Core Denial of Service Vulnerability
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
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Medium 6.2
.NET Tampering Vulnerability
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.