{"id":"PUB-A-198291476","details":"In TBD of fvp.c, there is a possible way to glitch CPU behavior due to a missing permission check. This could lead to local escalation of privilege with physical access to device internals with no additional execution privileges needed. User interaction is not needed for exploitation.","aliases":["A-198291476","CVE-2021-39639"],"modified":"2026-09-24T20:28:40.724672881Z","published":"2021-12-01T00:00:00Z","references":[{"type":"ADVISORY","url":"https://source.android.com/security/bulletin/2021-12-01"}],"affected":[{"package":{"name":":unknown:","ecosystem":"Android"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"Pixel-family specific:0"},{"fixed":"Pixel-family specific:2021-12-05"}]}],"versions":["Pixel-family specific"],"ecosystem_specific":{"severity":"High","spl":"2021-12-05","types":["EoP"]},"database_specific":{"source":"https://storage.googleapis.com/android-osv/PUB-A-198291476.json"}}],"schema_version":"1.9.0"}