In the Android kernel in the mnh driver there is a race condition due to insufficient locking. This could lead to a use-after-free which could lead to escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9271
Reference (s):
- https://source.android.com/security/bulletin/pixel/2019-09-01