Information leak on XSAVE/XRSTOR capable AMD CPUs

ISSUE DESCRIPTION On AMD processors supporting XSAVE/XRSTOR family 15h and up, when an exception is pending, these instructions save/restore only the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR. This allows one domain to determine portions of the state of floating point instructions of othe...

CVE-2006-1056

The Linux kernel before 2.6.16.9 and the FreeBSD kernel, when running on AMD64 and other 7th and 8th generation AuthenticAMD processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one process to determine portions of the stat...