Researchers have disclosed CVE-2026-89775, a critical flaw in the Linux kernel’s ARM64 KVM virtualization code. When nested virtualization is enabled, a guest can read and write freed host memory, creating a potential guest-to-host escape. Administrators should patch to Linux 6.18.51, 7.2.5, or 7.3-rc1, or verify that the experimental nested-virtualization feature is disabled.

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VMware has stopped selling its SmartNIC-based distributed firewall after customers showed interest but failed to buy, marking a retreat from the company’s push to bring hyperscaler-style hardware acceleration to private clouds. The Distributed Services Engine remains supported in Cloud Foundation, so existing SmartNIC integrations are not being abandoned outright.

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Windows 11 Insider build 29671.1000 adds extensive Start menu controls as Microsoft continues the Future Platforms preview series following build 29667’s fixes. Testers can now control which Start sections appear, choose a fixed menu size, and hide profile details, while the release also repairs Linux VM folder sharing and a UAC-related system freeze.

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Windows 11 Insider Beta build 26220.9492 addresses two problems that can disrupt administrator workflows: File History incorrectly reporting that no usable backup drives exist and Hyper-V Linux guests losing access to shared host folders. The 25H2 preview also adds a Live Captions setting that controls whether screen-reader audio appears in transcriptions.

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