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Update CHANGELOG with kernel lockdown change for Azure Linux #5737

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Update CHANGELOG with kernel lockdown change for Azure Linux #5737

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Update CHANGELOG with kernel lockdown change for Azure Linux
flora-taagen Apr 23, 2026
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flora-taagen Apr 28, 2026
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Expand Up @@ -38,6 +38,7 @@ For deprecation, rollouts and patch timelines by region, please check the [AKS-R
* Starting with Kubernetes 1.34, clusters using [Azure CNI Powered by Cilium](https://learn.microsoft.com/azure/aks/azure-cni-powered-by-cilium) include a new AKS-managed `cilium-fluent-bit` component to improve Cilium supportability.
* The `noProxy` validation for [HTTP proxy configuration](https://learn.microsoft.com/azure/aks/http-proxy) has been relaxed. The updated validation only runs upon changes to the `noProxy` field and uses a less strict regex, unblocking customers with non-standard `noProxy` entries.
* When using [HTTP Proxy](https://aka.ms/aks/http-proxy), you can't add more than 20 Trusted CA Certificates. See [HTTP Proxy limitations](https://aka.ms/aks/http-proxy) for more information.
* Going forward, Azure Linux on AKS will disable kernel lockdown by default. This change enables AKS customers to install custom GPU drivers when using Azure Linux 3.0. See [Disable kernel lockdown mode for Azure Linux](https://github.com/Azure/AKS/issues/5735) for more details.
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@RishiMody7 RishiMody7 Apr 27, 2026

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If a customer does want to enable the lockdown, is that process documented?

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@flora-taagen flora-taagen Apr 28, 2026

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We will still allow customers to enable lockdown on TL scenarios. For TL, the Azure Linux 3.0 kernel will automatically enable kernel lockdown when Secure Boot is detected via an out-of-tree (OOT) patch.


### Component Updates
* [Node Auto Provisioning](https://learn.microsoft.com/azure/aks/node-autoprovision) has been updated to Karpenter Azure provider [v1.10.1](https://github.com/Azure/karpenter-provider-azure/releases/tag/v1.10.1).
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