app/aboot/aboot.c in the Qualcomm components in Android before 2016-07-05 on Nexus 5 devices does not properly check for an integer overflow, which allows attackers to bypass intended access restrictions via crafted start and size values, aka Android internal bug 28820720 and Qualcomm internal bug CR681957, a related issue to CVE-2014-4325.
https://source.codeaurora.org/quic/la/kernel/lk/commit/?id=fc3b31f81a1c128c2bcc745564a075022cd72a2e
https://source.codeaurora.org/quic/la/kernel/lk/commit/?id=ce2a0ea1f14298abc83729f3a095adab43342342