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Rocky Linux 9 RLSA-2026-4578 - Important Update Released for .NET 9.0 Fix

Important: .NET 9.0 security update. {"type": "TYPE_SECURITY", "shortCode": "RL", "name": "RLSA-2026:4456", "synopsis": "Important: .NET 9.0 security update", "severity": "SEVERITY_IMPORTANT", "topic": "An update is available for dotnet9.0.\nThis update affects Rocky Linux 9.\nA Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list", "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.\n\nNew 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):\n\n* .net: .NET: Denial of Service via out-of-bounds read (CVE-2026-26127)\n\n* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)\n\nFor 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.", "solution": null, "affectedProducts": ["Rocky Linux 9"], "fixes": [{"ticket": "2446098", "sourceBy": "Red Hat", "sourceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=2446098", "description": ""}, {"ticket": "2446134", "sourceBy": "Red Hat", "sourceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=2446134", "description": ""}], "cves": [{"name": "CVE-2026-26127", "sourceBy": "MITRE", "sourceLink": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-26127", "cvss3ScoringVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "cvss3BaseScore": "7.5", "cwe": "CWE-125"}, {"name": "CVE-2026-26130", "sourceBy": "MITRE", "sourceLink": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-26130", "cvss3ScoringVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "cvss3BaseScore": "7.5", "cwe": "CWE-770"}], "references": [], "publishedAt": "2026-03-13T12:03:59.563415Z", "rpms": {"Rocky Linux 9":{"nvras": ["aspnetcore-runtime-9.0-0:9.0.14-1.el9_7.aarch64.rpm", "aspnetcore-runtime-9.0-0:9.0.14-1.el9_7.ppc64le.rpm", "aspnetcore-runtime-9.0-0:9.0.14-1.el9_7.s390x.rpm", "aspnetcore-runtime-9.0-0:9.0.14-1.el9_7.x86_64.rpm", "aspnetcore-runtime-dbg-9.0-0:9.0.14-1.el9_7.aarch64.rpm", "aspnetcore-runtime-dbg-9.0-0:9.0.14-1.el9_7.ppc64le.rpm", "aspnetcore-runtime-dbg-9.0-0:9.0.14-1.el9_7.s390x.rpm", "aspnetcore-runtime-dbg-9.0-0:9.0.14-1.el9_7.x86_64.rpm", "aspnetcore-targeting-pack-9.0-0:9.0.14-1.el9_7.aarch64.rpm", "aspnetcore-targeting-pack-9.0-0:9.0.14-1.el9_7.ppc64le.rpm", 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Discover the important security update for .NET 9.0 on Rocky Linux addressing denial of service vulnerabilities.. dotnet security update, Rocky Linux security, .NET 9.0 vulnerabilities. . LinuxSecurity.com Team

Mar 13, 2026 Rocky Linux