Arun Sharma has discovered a vulnerability that affects Linux ia64 kernels. When the psr.mfh bit is checked without checking the identity of the FPH owner, another process may be able to see the first process’s registers.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/33773/linux.ia64.psr.mfh.txt
Source: https://packetstormsecurity.com/files/33773/linux.ia64.psr.mfh.txt.html