Security Update 2015-002 is now available and addresses the
following:

iCloud Keychain
Available for:  OS X Yosemite v10.10.2
Impact:  An attacker with a privileged network position may be able to execute arbitrary code
Description:  Multiple buffer overflows existed in the handling of data during iCloud Keychain recovery. These issues were addressed through improved bounds checking.
CVE-ID
CVE-2015-1065 : Andrey Belenko of NowSecure

IOAcceleratorFamily
Available for:  OS X Mountain Lion v10.8.5, OS X Mavericks v10.9.5, and OS X Yosemite v10.10.2
Impact:  A malicious application may be able to execute arbitrary code with system privileges
Description:  An off by one issue existed in IOAcceleratorFamily.
This issue was addressed through improved bounds checking.
CVE-ID
CVE-2015-1066 : Ian Beer of Google Project Zero

IOSurface
Available for:  OS X Mountain Lion v10.8.5, OS X Mavericks v10.9.5, and OS X Yosemite v10.10.2
Impact:  A malicious application may be able to execute arbitrary code with system privileges
Description:  A type confusion issue existed in IOSurface's handling of serialized objects. The issue was addressed through additional type checking.
CVE-ID
CVE-2015-1061 : Ian Beer of Google Project Zero

Kernel
Available for:  OS X Yosemite v10.10.2
Impact:  Maliciously crafted or compromised applications may be able to determine addresses in the kernel
Description:  The mach_port_kobject kernel interface leaked kernel addresses and heap permutation value, which may aid in bypassing address space layout randomization protection. This was addressed by disabling the mach_port_kobject interface in production configurations.
CVE-ID
CVE-2014-4496 : TaiG Jailbreak Team

Secure Transport
Available for:  OS X Mountain Lion v10.8.5, OS X Mavericks v10.9.5, and OS X Yosemite v10.10.2
Impact:  An attacker with a privileged network position may intercept SSL/TLS connections
Description:  Secure Transport accepted short ephemeral RSA keys, usually used only in export-strength RSA cipher suites, on connections using full-strength RSA cipher suites. This issue, also known as FREAK, only affected connections to servers which support export-strength RSA cipher suites, and was addressed by removing support for ephemeral RSA keys.
CVE-ID
CVE-2015-1067 : Benjamin Beurdouche, Karthikeyan Bhargavan, Antoine Delignat-Lavaud, Alfredo Pironti, and Jean Karim Zinzindohoue of Prosecco at Inria Paris


Security Update 2015-002 may be obtained from the Mac App Store or Apple's Software Downloads web site:
http://www.apple.com/support/downloads/

Information will also be posted to the Apple Security Updates web site: http://support.apple.com/kb/HT1222