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October 12, 2026 · Google CloudFeature

Container Optimized OS enables Arm CCA guest attestation, disables Magic SysRq on TDX host

Enabled CONFIG_ARM_CCA_GUEST in the Linux kernel for ARM64 to support guest attestation on Arm CCA Confidential VMs.

Security: Disable Magic SysRq for gmec-tdx-kernel-host

Text from the Google Cloud release notes, licensed under CC BY 4.0. Source: Google Cloud release notes.

Source: Google Cloud release notes
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