{"id":"ALSA-2026:54590","summary":"Important: .NET 9.0 security, bug fix, and enhancement update","details":".NET is a fast, lightweight and modular platform for creating cross platform applications that work on Linux, macOS and Windows. It particularly focuses on creating console applications, web applications and micro-services. .NET contains a runtime conforming to .NET Standards a set of framework libraries, an SDK containing compilers and a 'dotnet' application to drive everything.  \n\nSDK version: 9.0.120  \nRuntime version: 9.0.19  \n\nSecurity Fix(es):  \n\n  * .NET: .NET Core: .NET Security Feature Bypass Vulnerability (CVE-2026-62899)\n  * .NET: .NET Information Disclosure Vulnerability (CVE-2026-62900)\n  * .NET: .NET Denial of Service Vulnerability (CVE-2026-62901)\n  * .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * Update .NET 9.0 to SDK 9.0.120 and Runtime 9.0.19 [almalinux-10.2.z] (JIRA:AlmaLinux-235477)\n\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.\n","modified":"2026-08-14T17:15:03.162932664Z","published":"2026-08-13T00:00:00Z","related":["CVE-2026-62899","CVE-2026-62900","CVE-2026-62901","CVE-2026-62909"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:54590"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-62899"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-62900"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-62901"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-62909"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2512175"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2512179"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2512180"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2512185"},{"type":"ADVISORY","url":"https://errata.almalinux.org/10/ALSA-2026-54590.html"}],"affected":[{"package":{"name":"aspnetcore-runtime-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/aspnetcore-runtime-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.19-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"aspnetcore-runtime-dbg-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/aspnetcore-runtime-dbg-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.19-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"aspnetcore-targeting-pack-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/aspnetcore-targeting-pack-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.19-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"dotnet-apphost-pack-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/dotnet-apphost-pack-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.19-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"dotnet-hostfxr-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/dotnet-hostfxr-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.19-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"dotnet-runtime-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/dotnet-runtime-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.19-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"dotnet-runtime-dbg-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/dotnet-runtime-dbg-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.19-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"dotnet-sdk-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/dotnet-sdk-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.120-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"dotnet-sdk-9.0-source-built-artifacts","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/dotnet-sdk-9.0-source-built-artifacts"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.120-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"dotnet-sdk-aot-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/dotnet-sdk-aot-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.120-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"dotnet-sdk-dbg-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/dotnet-sdk-dbg-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.120-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:54590.json"}},{"package":{"name":"dotnet-targeting-pack-9.0","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/dotnet-targeting-pack-9.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.19-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-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