The x86_decode_insn function in arch/x86/kvm/emulate.c in the Linux kernel before 4.8.7, when KVM is enabled, allows local users to cause a denial of service (host OS crash) via a certain use of a ModR/M byte in an undefined instruction.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8630
Reference (s):
- BID:94459
- URL: http://www.securityfocus.com/bid/94459
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d9092f52d7e61dd1557f2db2400ddb430e85937e
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7
- https://bugzilla.redhat.com/show_bug.cgi?id=1393350