As part of its hardware announcements today, Apple issued iOS 8.2 for iPhone and iPad users, and as is somewhat customary, has quietly released a security update for OS X that patches a number of known vulnerabilities in the software. As in most cases, the vulnerabilities here are somewhat cryptic to most people; however, they are important so be sure you run Software Update on your Mac as soon as you can, to keep your system patched.
There are five specific vulnerabilities addressed by this update: One was in iCloud Keychain recovery could allow someone on your network to access your system and execute arbitrary code. Three are in apple’s core services (IOAccelerator, IOSurface, and the OS X Kernel) that could allow a malicious program to run code it would otherwise be blocked from running.
The update, called “Security Update 2015-002” should be available for OS X in the Software Update section of the App Store, so if you have not already received a notice on your system to update, then you can do so by going to the Apple menu and choosing App Store or Software Update, and then checking for and applying the update when it appears. This update will require you to restart your Mac.
As always, be sure you fully back up your system before applying this or any other updates.