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[Feature]: Base image mcr.microsoft.com/azure-powershell:ubuntu-24.04 ships vulnerable .NET runtime (CVE-2026-42899) #29633

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Description

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Description of the new feature

Summary

The mcr.microsoft.com/azure-powershell:ubuntu-24.04 base image bundles a .NET runtime version affected by CVE-2026-42899 (CVSS 7.5 HIGH). A new image with .NET ≥ 9.0.16 is needed to remediate the vulnerability.

CVE Details

Field Value
CVE ID CVE-2026-42899
Severity 7.5 HIGH (CVSS 3.1: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Weakness CWE-835 – Loop with Unreachable Exit Condition (Infinite Loop)
Description ASP.NET Core allows an unauthenticated remote attacker to deny service over a network
Affected versions .NET 9.x < 9.0.16
Fixed in .NET 9.0.16
Microsoft Advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899

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