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

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-0009
• https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
• https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
• https://source.android.com/security/bulletin/2020-01-01
• https://source.android.com/security/bulletin/2020-01-11
• http://packetstormsecurity.com/files/155903/Android-ashmem-Read-Only-Bypasses.html