CVE-2025-20658: 
NixOS vulnerability analysis and mitigation

CVE-2025-20658 is a high-severity vulnerability discovered in MediaTek's DA (Download Agent) component. The vulnerability was disclosed on April 7, 2025, and affects multiple MediaTek chipsets across various Android versions. It involves a permission bypass vulnerability due to a logic error that could potentially lead to local privilege escalation (MediaTek Bulletin).

The vulnerability is classified as an Out-of-bounds Write (CWE-787) issue. It has received a CVSS v3.1 Base Score of 6.0 (Medium) with the following vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L. The vulnerability affects multiple MediaTek chipsets including MT2718, MT6781, MT6789, MT6835, MT6855, and several others, running on Android versions 12.0 through 15.0 (NVD).

If exploited, this vulnerability could lead to local escalation of privilege on affected devices. The attack requires physical access to the device, but no additional execution privileges or user interaction is needed for exploitation (MediaTek Bulletin).

MediaTek has addressed this vulnerability in their April 2025 Product Security Bulletin. Device OEMs were notified of the issue and corresponding security patches at least two months before publication. Users are advised to apply security updates provided by their device manufacturers (MediaTek Bulletin).