ALAS2023-2026-1868

References: CVE-2026-45490  CVE-2026-45491  CVE-2026-45591 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

Improper authorization in .NET allows an authorized attacker to elevate privileges locally. (CVE-2026-45490)

Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally. (CVE-2026-45491)

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network. (CVE-2026-45591)

Issue Correction:
Run dnf update dotnet9.0 --releasever 2023.12.20260622 or dnf update --advisory ALAS2023-2026-1868 --releasever 2023.12.20260622 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation

New Packages:

aarch64:
    dotnet-sdk-aot-9.0-debuginfo-9.0.118-1.amzn2023.0.2.aarch64
    netstandard-targeting-pack-2.1-9.0.118-1.amzn2023.0.2.aarch64
    dotnet-sdk-9.0-debuginfo-9.0.118-1.amzn2023.0.2.aarch64
    aspnetcore-targeting-pack-9.0-9.0.17-1.amzn2023.0.2.aarch64
    aspnetcore-runtime-dbg-9.0-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-apphost-pack-9.0-debuginfo-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-sdk-aot-9.0-9.0.118-1.amzn2023.0.2.aarch64
    dotnet-sdk-9.0-9.0.118-1.amzn2023.0.2.aarch64
    dotnet-sdk-dbg-9.0-9.0.118-1.amzn2023.0.2.aarch64
    dotnet-targeting-pack-9.0-9.0.17-1.amzn2023.0.2.aarch64
    dotnet9.0-debugsource-9.0.118-1.amzn2023.0.2.aarch64
    dotnet-hostfxr-9.0-debuginfo-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-apphost-pack-9.0-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-hostfxr-9.0-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-runtime-dbg-9.0-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-sdk-9.0-source-built-artifacts-9.0.118-1.amzn2023.0.2.aarch64
    dotnet-runtime-9.0-debuginfo-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-runtime-9.0-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-templates-9.0-9.0.118-1.amzn2023.0.2.aarch64
    dotnet-host-9.0.17-1.amzn2023.0.2.aarch64
    aspnetcore-runtime-9.0-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-host-debuginfo-9.0.17-1.amzn2023.0.2.aarch64
    dotnet-9.0.118-1.amzn2023.0.2.aarch64

src:
    dotnet9.0-9.0.118-1.amzn2023.0.2.src

x86_64:
    dotnet-sdk-9.0-source-built-artifacts-9.0.118-1.amzn2023.0.2.x86_64
    dotnet-sdk-aot-9.0-debuginfo-9.0.118-1.amzn2023.0.2.x86_64
    aspnetcore-runtime-9.0-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-host-debuginfo-9.0.17-1.amzn2023.0.2.x86_64
    aspnetcore-runtime-dbg-9.0-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-apphost-pack-9.0-debuginfo-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-templates-9.0-9.0.118-1.amzn2023.0.2.x86_64
    netstandard-targeting-pack-2.1-9.0.118-1.amzn2023.0.2.x86_64
    dotnet-9.0.118-1.amzn2023.0.2.x86_64
    dotnet-sdk-9.0-debuginfo-9.0.118-1.amzn2023.0.2.x86_64
    dotnet-sdk-dbg-9.0-9.0.118-1.amzn2023.0.2.x86_64
    dotnet-apphost-pack-9.0-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-hostfxr-9.0-9.0.17-1.amzn2023.0.2.x86_64
    aspnetcore-targeting-pack-9.0-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-host-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-hostfxr-9.0-debuginfo-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-runtime-dbg-9.0-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-runtime-9.0-debuginfo-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-runtime-9.0-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-sdk-aot-9.0-9.0.118-1.amzn2023.0.2.x86_64
    dotnet9.0-debugsource-9.0.118-1.amzn2023.0.2.x86_64
    dotnet-targeting-pack-9.0-9.0.17-1.amzn2023.0.2.x86_64
    dotnet-sdk-9.0-9.0.118-1.amzn2023.0.2.x86_64