Many OS vendors left systems open to attack

Most major OS vendors are releasing security patches after a misunderstanding left their systems open to attack.

The problem came when vendors implemented a hardware debug mechanism for Intel x86-64 architectures.

The supporting documentation was apparently unclear and incomplete, which caused the issue.

Apple, Microsoft and SUSE Linux were just some of the systems open to attack, but all of the affected vendors have released security patches to fix the bug.