CVE-2025-48534: 
NixOS vulnerability analysis and mitigation

CVE-2025-48534 is a security vulnerability discovered in the Android operating system's CellBroadcastHandler.java component, specifically in the getDefaultCBRPackageName function. The vulnerability was disclosed on September 4, 2025, affecting Android versions 13.0, 14.0, and 15.0. This vulnerability is characterized as a denial of service issue that requires system execution privileges (NVD, Android Bulletin).

The vulnerability stems from a logic error in the getDefaultCBRPackageName function within CellBroadcastHandler.java. The issue has been assigned a CVSS v3.1 base score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The vulnerability is classified under CWE-693 (Protection Mechanism Failure) and requires system execution privileges for exploitation, though user interaction is not needed (NVD).

The vulnerability could lead to local denial of service with System execution privileges. When successfully exploited, it could allow an attacker to perform denial of service attacks against the affected Android system components (NVD, CIS Security).

Google has released a security patch to address this vulnerability. The fix was implemented through a code update in the CellBroadcastHandler.java file, as evidenced by the commit 584cec4f17eab96ac44bce4e1bce8d6a2c59cd75. Users are advised to update their Android devices to the security patch level 2025-09-05 or later (Android Source).