CVE-2023-20636: 
NixOS vulnerability analysis and mitigation

CVE-2023-20636 is a security vulnerability identified in MediaTek's display drm component. The vulnerability was disclosed in March 2023 and affects various MediaTek chipsets including MT6895, MT6985, MT8168, and MT8781 running Android versions 12.0 and 13.0 (MediaTek Bulletin).

The vulnerability is classified as a medium severity issue related to improper input validation in the display drm component. Specifically, it involves a possible out-of-bounds write condition that occurs due to a missing bounds check in the system (MediaTek Bulletin).

The vulnerability could lead to local escalation of privilege with System execution privileges needed. This means an attacker could potentially gain elevated system privileges on affected devices, though user interaction is not needed for exploitation (MediaTek Bulletin).

MediaTek has addressed this vulnerability through security patches. Device manufacturers were notified of the issue and corresponding security patches at least two months before the public disclosure. Users should ensure their devices are updated with the latest security patches provided by their device manufacturers (MediaTek Bulletin).