The __switch_to function in arch/x86/kernel/process_64.c in the Linux
kernel through 3.18.1 does not ensure that Thread Local Storage (TLS)
descriptors are loaded before proceeding with other steps, which makes
it easier for local users to bypass the ASLR protection mechanism via
a crafted application that reads a TLS base address.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20141225 Re: CVE Request: Linux x86_64 userspace address leak
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