In calc_vm_may_flags of ashmem.c, there is a possible arbitrary write to shared memory due to a permissions bypass. This could lead to local escalation of privilege by corrupting memory shared between processes, with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-142938932

CONFIRM:https://source.android.com/security/bulletin/2020-01-01 | MISC:http://packetstormsecurity.com/files/155903/Android-ashmem-Read-Only-Bypasses.html | MLIST:[debian-lts-announce] 20200609 [SECURITY] [DLA 2241-1] linux security update | URL:https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html | MLIST:[debian-lts-announce] 20200610 [SECURITY] [DLA 2241-2] linux security update | URL:https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html