In the Android kernel in the kernel MMU code there is a possible execution path leaving some kernel text and rodata pages writable. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
https://www.debian.org/security/2020/dsa-4698
https://source.android.com/security/bulletin/pixel/2019-09-01
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html