CVE-2016-5349

The high level operating systems (HLOS) was not providing sufficient memory
address information to ensure that secure applications inside Qualcomm
Secure Execution Environment (QSEE) only write to legitimate memory ranges
related to the QSEE secure application’s HLOS client. When secure
applications inside Qualcomm Secure Execution Environment (QSEE) receive
memory addresses from a high level operating system (HLOS) such as Linux
Android, those address have previously been verified as belonging to HLOS
memory space rather than QSEE memory space, but they were not verified to
be from HLOS user space rather than kernel space. This lack of verification
could lead to privilege escalation within the HLOS.

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