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critical advisory

Qemu-kvm HyperV Syndbg Out-of-Bounds Write Vulnerability

A critical vulnerability, CVE-2026-3842, exists in the `hyperv/syndbg` component of Qemu-kvm, allowing an attacker to perform out-of-bounds writes on the host system due to a missing mapped-length guard after a `cpu_physical_memory_map` operation.

Qemu-kvm virtualization hypervisor vulnerability guest-to-host-escape
1c