GCP Release Notes: October 17, 2025

Cloud SQL for MySQL

Feature

Cloud SQL Enterprise edition now supports a new machine series called the N4 machine series. This machine series provides balanced price-to-performance and uses the Hyperdisk Balanced storage. You can create custom machine types for the N4 machine series with up to 80 vCPUs and up to 640 GB memory. The N4 machine series is generally available (GA).

For more information about the N4 machine series and its availability, see Machine series overview.

Feature

The C4A machine series is now generally available (GA).

The C4A machine series is supported for Cloud SQL Enterprise Plus edition instances, and provides optimized price-performance and delivers predictable high performance for high demand Cloud SQL workloads. It uses the Hyperdisk Balanced storage.

For more information about the C4A machine series and its availability, see Machine series overview.

Cloud SQL for PostgreSQL

Feature

Cloud SQL Enterprise edition now supports a new machine series called the N4 machine series. This machine series provides balanced price-to-performance and uses the Hyperdisk Balanced storage. You can create custom machine types for the N4 machine series with up to 80 vCPUs and up to 640 GB memory. The N4 machine series is generally available (GA).

For more information about the N4 machine series and its availability, see Machine series overview.

Feature

The C4A machine series is now generally available (GA).

The C4A machine series is supported for Cloud SQL Enterprise Plus edition instances, and provides optimized price-performance and delivers predictable high performance for high demand Cloud SQL workloads. It uses the Hyperdisk Balanced storage.

For more information about the C4A machine series and its availability, see Machine series overview.

Cloud SQL for SQL Server

Feature

Cloud SQL Enterprise edition now supports a new machine series called the N4 machine series. This machine series provides balanced price-to-performance and uses the Hyperdisk Balanced storage. You can create custom machine types for the N4 machine series with up to 80 vCPUs and up to 640 GB memory. The N4 machine series is generally available (GA).

For more information about the N4 machine series and its availability, see Machine series overview.

Compute Engine

Feature

Generally Available: You can now access the Compute Engine alpha API at the project level through a self-service process. By enabling the alpha API, you can use the Google Cloud console, Google Cloud CLI, API, and Terraform to view and manage Preview features. For more information, see Use the Compute Engine alpha API.

Container Optimized OS

Changed

cos-125-19216-0-94

Kernel	Docker	Containerd	GPU Drivers
COS-6.12.46	v27.5.1	v2.1.3	See List

Fixed

Updated the dump capture kernel to v6.12.52.

Fixed

Added task information collection to sosreports.

Fixed

Updated golang.org/x/crypto, golang.org/x/net, and golang.org/x/oauth2 in kubelet and kubectl.

Security

Fixed CVE-2025-41244 in app-emulation/open-vm-tools.

Security

Fixed KCTF-6bb73db in the Linux Kernel.

Security

Fixed CVE-2025-39963 in the Linux kernel.

Security

Fixed CVE-2025-39965 in the Linux kernel.

Security

Fixed CVE-2025-39961 in the Linux kernel.

Changed

Runtime sysctl changes:

• Changed: fs.file-max: 811514 -> 811534
• Changed: net.ipv4.udp_mem: 188034 250714 376068 -> 188034 250715 376068

Google Kubernetes Engine

Issue

Don’t use GKE version 1.34.1-gke.1431000 or later when creating or upgrading node pools with the a3-highgpu-8g machine type. GKE nodes with these versions include COS Milestone 125, which has an updated Linux kernel version that is incompatible with GPUDirect-TCPX.

Memorystore for Valkey

Feature

You can now create an instance in Memorystore for Valkey, even if a zone of the region where you want the instance to be created is unavailable. If this occurs, then Memorystore for Valkey creates the instance in the available zones of the region. This feature is Generally Available.

Text-to-Speech

Feature

Chirp 3 HD now supports speech synthesis using SSML input. Supported SSML tags are: <phoneme>, <p>, <s>, <sub>, and <say-as>. For more information, see Chirp 3 HD: SSML support.

Source: Google Cloud Platform