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pavneeta authored Jan 18, 2025
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* AKS Kubernetes patch versions 1.29.11, 1.30.7, 1.31.2, and 1.31.3 are now available.
* AKS LTS version 1.27.101 available in all regions since December 2024. This patches the kubelet [CVE-2024-10220](https://nvd.nist.gov/vuln/detail/CVE-2024-10220)
* AKS no longer supports the [GPU image (preview)](https://github.com/Azure/AKS/issues/4472) to provision GPU-enabled AKS nodes. Alternative options that are supported today and recommended by AKS include the default experience with manual NVIDIA device plugin installation or the NVIDIA GPU Operator, detailed in [AKS GPU node pool documentation](https://learn.microsoft.com/azure/aks/gpu-cluster?tabs=add-ubuntu-gpu-node-pool#confirm-that-gpus-are-schedulable).
* [Kubernetes version 1.32 is the last version that supports Windows Server 2019](https://github.com/Azure/AKS/issues/4268). You will not be able to create new or upgrade existing Windows Server 2019 node pools to in AKS versions 1.33+. Follow the detailed steps [in AKS documentation](https://aka.ms/aks/ws2019-migration) to transition to Windows Server 2022 or any newly supported Windows Server version by that date. After 1 March 2026, Windows Server 2019 won't be supported.
* [Kubernetes version 1.32 is the last version that supports Windows Server 2019](https://github.com/Azure/AKS/issues/4268). You will not be able to create new or upgrade existing Windows Server 2019 node pools in AKS versions 1.33+. Follow the detailed steps [in AKS documentation](https://aka.ms/aks/ws2019-migration) to transition to Windows Server 2022 or any newly supported Windows Server version by that date. After 1 March 2026, Windows Server 2019 won't be supported.
* New API throttling limit has been added to [PutManagedCluster](https://learn.microsoft.com/rest/api/aks/managed-clusters?view=rest-aks-2024-09-01) API for AKS. Please see [AKS resource provider throttling limits](aka.ms/aks/throttling) for more details.

### Release Notes
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* Bug Fix:
* GPU bootstrapping issue impacting GPU provisioning with Node Auto Provision has been fixed. Refer [Github issue](https://github.com/Azure/karpenter-provider-azure/pull/587) for more details.
* Fixed an issue in v1.31 where Cluster Autoscaler did not respond to external changes in Spot VMSS count (e.g., evictions), leading to scale-up failures. See more details [Github Issue 7373](https://github.com/kubernetes/autoscaler/issues/7373)
* Resolved an issue (re:[NotFound)](https://learn.microsoft.com/en-us/azure/azure-resource-manager/troubleshooting/error-not-found?tabs=bicep#symptoms) when querying a VM which has been deleted, which results in the NodeClaim being stuck in notReady state resulting in the NodeClaim not being deleted.
* Fixed the windows nodes CNS pods restarting [Github issue](https://github.com/Azure/AKS/issues/4679).This is resolved by bypassing the startup script and using the Pod InClusterConfig instead of a static kubeconfig when CNS is running on AKS >1.27.
* Fixed an issue in v1.31 where Cluster Autoscaler did not respond to external changes in Spot VMSS count (e.g., evictions), leading to scale-up failures. Refer [Github Issue 7373](https://github.com/kubernetes/autoscaler/issues/7373) for more details.
* Resolved an issue [(NotFound error message)](https://learn.microsoft.com/en-us/azure/azure-resource-manager/troubleshooting/error-not-found?tabs=bicep#symptoms) when querying a VM which has been deleted, which results in the NodeClaim being stuck in notReady state resulting in the NodeClaim not being deleted.
* Fixed the windows nodes CNS pods restarting [Github issue](https://github.com/Azure/AKS/issues/4679). This is resolved by bypassing the startup script and using the Pod InClusterConfig instead of a static kubeconfig when CNS is running on AKS >1.27.

* Component updates:
* Tigera operator image version has been bumped to [v1.34.7](https://github.com/tigera/operator/releases/tag/v1.34.7) with this release, for clusters running Kubernetes version (and including) v1.30.0. This patches the follwing CVEs detected in the tigera operator - [CVE-2021-3999](https://nvd.nist.gov/vuln/detail/CVE-2021-3999), [CVE-2020-1751](https://nvd.nist.gov/vuln/detail/CVE-2020-1751), [CVE-2019-19126](https://nvd.nist.gov/vuln/detail/CVE-2019-19126), [CVE-2021-35942](https://nvd.nist.gov/vuln/detail/CVE-2021-35942), [CVE-2020-1752](https://nvd.nist.gov/vuln/detail/CVE-2020-1752), [CVE-2020-10029](https://nvd.nist.gov/vuln/detail/CVE-2020-10029), [CVE-2019-9169](https://nvd.nist.gov/vuln/detail/CVE-2019-9169), [CVE-2020-6096](https://nvd.nist.gov/vuln/detail/CVE-2020-6096), [CVE-2021-38604](https://nvd.nist.gov/vuln/detail/CVE-2021-38604), [CVE-2018-19591](https://nvd.nist.gov/vuln/detail/CVE-2018-19591), [CVE-2018-20796](https://nvd.nist.gov/vuln/detail/CVE-2018-20796), [CVE-2019-9192](https://nvd.nist.gov/vuln/detail/CVE-2019-9192), [CVE-2021-3326](https://nvd.nist.gov/vuln/detail/CVE-2021-3326), [CVE-2019-6488](https://nvd.nist.gov/vuln/detail/CVE-2019-6488), [CVE-2016-10739](https://nvd.nist.gov/vuln/detail/CVE-2016-10739), [CVE-2019-7309](https://nvd.nist.gov/vuln/detail/CVE-2019-7309), [CVE-2022-23219](https://nvd.nist.gov/vuln/detail/CVE-2022-23219), [CVE-2022-23218](https://nvd.nist.gov/vuln/detail/CVE-2022-23218), [CVE-2019-25013](https://nvd.nist.gov/vuln/detail/CVE-2019-25013), [CVE-2020-27618](https://nvd.nist.gov/vuln/detail/CVE-2020-27618).

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* Azure Disks CSI driver version has been bumped to [v1.30.6](https://github.com/kubernetes-sigs/azuredisk-csi-driver/releases/tag/v1.30.6) for AKS clusters running AKS Kubernetes version +v1.30. This patches the follwoing CVEs - [CVE-2024-51744](https://nvd.nist.gov/vuln/detail/CVE-2024-51744), [CVE-2024-50602](https://nvd.nist.gov/vuln/detail/CVE-2024-50602), [CVE-2024-9143](https://nvd.nist.gov/vuln/detail/CVE-2024-9143), [CVE-2019-11255](https://nvd.nist.gov/vuln/detail/CVE-2019-11255)

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* Bumping the Azure CNI version from v1.4.56 to v1.4.58 for AKS clusters (K8s version) This patches the CVE regarding grpc 1.52.0 dependencies - [CVE-2023-2976](https://nvd.nist.gov/vuln/detail/CVE-2023-2976), [CVE-2020-8908](https://nvd.nist.gov/vuln/detail/CVE-2020-8908)
* Bumping the Azure CNI version from v1.4.56 to v1.4.58. This patches the CVE regarding grpc 1.52.0 dependencies - [CVE-2023-2976](https://nvd.nist.gov/vuln/detail/CVE-2023-2976), [CVE-2020-8908](https://nvd.nist.gov/vuln/detail/CVE-2020-8908)
* Cilium container image verison bumped to [v1.14.15-241024](https://github.com/cilium/cilium/releases/tag/v1.14.15) for AKS clusters running k8s version greater than v1.29.

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* AKS Azure Linux image has been updated to [202501.12.0](vhd-notes/AzureLinux/202501.12.0.txt)
* AKS Ubuntu image has been updated to [202501.12.0.](vhd-notes/aks-ubuntu/AKSUbuntu-2204/202501.12.0.txt)
* AKS Ubuntu image has been updated to [202501.12.0](vhd-notes/aks-ubuntu/AKSUbuntu-2204/202501.12.0.txt)
* AKS Windows Server 2022 image has been updated to [v20348.2966.241218](vhd-notes/AKSWindows/2022/20348.2966.241218.txt)
* AKS Windows Server 2019 image has been updated to [17763.6659.241226](vhd-notes/AKSWindows/2019/17763.6659.241226.txt)
* AKS Windows Server 23H2 image has been updated to [25398.1308.241226](vhd-notes/AKSWindows/23H2/25398.1308.241226.txt)
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