The flush_signal_handlers function in kernel/signal.c in the Linux
kernel before 3.8.4 preserves the value of the sa_restorer field
across an exec operation, which makes it easier for local users to
bypass the ASLR protection mechanism via a crafted application
containing a sigaction system call.
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MLIST:[oss-security] 20130311 CVE-2013-0914 Linux kernel sa_restorer information leak
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