ALAS2023-2026-1867

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 dotnet10.0 --releasever 2023.12.20260622 or dnf update --advisory ALAS2023-2026-1867 --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:
    aspnetcore-runtime-dbg-10.0-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-host-debuginfo-10.0.9-1.amzn2023.0.1.aarch64
    aspnetcore-targeting-pack-10.0-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-hostfxr-10.0-debuginfo-10.0.9-1.amzn2023.0.1.aarch64
    dotnet10.0-debuginfo-10.0.109-1.amzn2023.0.1.aarch64
    dotnet-hostfxr-10.0-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-sdk-10.0-source-built-artifacts-10.0.109-1.amzn2023.0.1.aarch64
    dotnet-targeting-pack-10.0-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-sdk-aot-10.0-10.0.109-1.amzn2023.0.1.aarch64
    aspnetcore-runtime-10.0-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-templates-10.0-10.0.109-1.amzn2023.0.1.aarch64
    dotnet-apphost-pack-10.0-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-sdk-dbg-10.0-10.0.109-1.amzn2023.0.1.aarch64
    dotnet-runtime-dbg-10.0-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-runtime-10.0-debuginfo-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-sdk-10.0-debuginfo-10.0.109-1.amzn2023.0.1.aarch64
    dotnet-10.0.109-1.amzn2023.0.1.aarch64
    dotnet-sdk-aot-10.0-debuginfo-10.0.109-1.amzn2023.0.1.aarch64
    dotnet-runtime-10.0-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-host-10.0.9-1.amzn2023.0.1.aarch64
    dotnet-apphost-pack-10.0-debuginfo-10.0.9-1.amzn2023.0.1.aarch64
    dotnet10.0-debugsource-10.0.109-1.amzn2023.0.1.aarch64
    dotnet-sdk-10.0-10.0.109-1.amzn2023.0.1.aarch64

src:
    dotnet10.0-10.0.109-1.amzn2023.0.1.src

x86_64:
    dotnet-sdk-10.0-source-built-artifacts-10.0.109-1.amzn2023.0.1.x86_64
    aspnetcore-runtime-10.0-10.0.9-1.amzn2023.0.1.x86_64
    dotnet-templates-10.0-10.0.109-1.amzn2023.0.1.x86_64
    dotnet-apphost-pack-10.0-debuginfo-10.0.9-1.amzn2023.0.1.x86_64
    dotnet-hostfxr-10.0-debuginfo-10.0.9-1.amzn2023.0.1.x86_64
    dotnet-runtime-10.0-debuginfo-10.0.9-1.amzn2023.0.1.x86_64
    dotnet-apphost-pack-10.0-10.0.9-1.amzn2023.0.1.x86_64
    aspnetcore-runtime-dbg-10.0-10.0.9-1.amzn2023.0.1.x86_64
    dotnet-10.0.109-1.amzn2023.0.1.x86_64
    dotnet-sdk-10.0-debuginfo-10.0.109-1.amzn2023.0.1.x86_64
    aspnetcore-targeting-pack-10.0-10.0.9-1.amzn2023.0.1.x86_64
    dotnet-sdk-aot-10.0-debuginfo-10.0.109-1.amzn2023.0.1.x86_64
    dotnet-hostfxr-10.0-10.0.9-1.amzn2023.0.1.x86_64
    dotnet-targeting-pack-10.0-10.0.9-1.amzn2023.0.1.x86_64
    dotnet-sdk-dbg-10.0-10.0.109-1.amzn2023.0.1.x86_64
    dotnet-runtime-dbg-10.0-10.0.9-1.amzn2023.0.1.x86_64
    dotnet10.0-debuginfo-10.0.109-1.amzn2023.0.1.x86_64
    dotnet-host-debuginfo-10.0.9-1.amzn2023.0.1.x86_64
    dotnet10.0-debugsource-10.0.109-1.amzn2023.0.1.x86_64
    dotnet-runtime-10.0-10.0.9-1.amzn2023.0.1.x86_64
    dotnet-sdk-aot-10.0-10.0.109-1.amzn2023.0.1.x86_64
    dotnet-sdk-10.0-10.0.109-1.amzn2023.0.1.x86_64
    dotnet-host-10.0.9-1.amzn2023.0.1.x86_64