CVE-2026-3842 | QEMU KVM hw/hyperv/syndbg.c cpu_physical_memory_map out-of-bounds write

A vulnerability identified as critical has been detected in QEMU. Affected by this vulnerability is the function cpu_physical_memory_map of the file hw/hyperv/syndbg.c of the component KVM. Performing a manipulation results in out-of-bounds write.

This vulnerability is reported as CVE-2026-3842. The attack may be carried out on the physical device. No exploit exists.

It is suggested to install a patch to address this issue.