CVE-2026-63940

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM Secure Encrypted Virtualization SEV module. This vulnerability occurs because the system does not properly handle Port I/O requests with a length of zero. An attacker, potentially from a guest virtual machine, could exploit...

CVE-2026-63940

In the Linux kernel KVM SEV issue, the vulnerability concerns ignoring Port I/O requests of length 0. The fix ensures that Port I/O requests with length 0 (or count 0) are explicitly ignored so that the software scratch area setup and related code won’t underflow the length, and to enable a warni...