cve-2026-46076

CVE-2026-46076 is a Linux kernel KVM vulnerability that addresses incorrect AMD nested-virtualization handling of VMMCALL instructions when a second-level guest runs under an L1 hypervisor. The bug is narrow and technical, focusing on the security boundary of instruction routing in nested virtualization environments. This tag covers discussions about the vulnerability, its disclosure by kernel.org and NVD, and the implications for modern infrastructure that stacks hypervisors and guest operating systems. The fix is significant for maintaining security in complex virtualization setups.