{"id":"ASB-A-204450605","details":"In fs/eventpoll.c, there is a possible use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.","aliases":["A-204450605","CVE-2021-39634"],"modified":"2026-09-18T15:47:37.392928379Z","published":"2022-01-01T00:00:00Z","references":[{"type":"ADVISORY","url":"https://source.android.com/security/bulletin/2022-01-01"},{"type":"FIX","url":"https://android.googlesource.com/kernel/common/+/f8d4f44df056c5b504b0d49683fb7279218fd207"}],"affected":[{"package":{"name":":linux_kernel:","ecosystem":"Android"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":":0"},{"fixed":":2022-01-05"}]}],"versions":["Kernel"],"ecosystem_specific":{"spl":"2022-01-05","types":["EoP"],"vanir_signatures":[{"source":"https://android.googlesource.com/kernel/common/+/f8d4f44df056c5b504b0d49683fb7279218fd207","target":{"file":"fs/eventpoll.c"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["281761851118573238417064251091957666292","66716452289808523718992946986435002294","238149171707000430488825594700649822945","26136525765657484005842846464340498509","193067148266005416477872802859470790853","88756201235542557271698617933401552938","150508037877092615736382668588997730010","184785842090014470300364861830991826586","124012108907255222333292463384886727462","14754910811055373754744278323106510798","338422229912443275097368711427458621123","257191157499221204848855334260604081658","151321889986198462900830560716771511738","72932826716581820486295703700363087347","111228602360053789999847191490887625423","179870949799274072871931870297664388759","161516205867268128265865626947277960082","226742925649578267199794237924187415355","295112841176974074523191062608716452742","111738587607780391033359608457242647485","2129751208561844047623001376462740887"]},"id":"ASB-A-204450605-c6a19363","signature_type":"Line","signature_version":"v1"},{"signature_type":"Function","signature_version":"v1","source":"https://android.googlesource.com/kernel/common/+/f8d4f44df056c5b504b0d49683fb7279218fd207","target":{"file":"fs/eventpoll.c","function":"ep_insert"},"deprecated":false,"digest":{"function_hash":"6325098871493236007769009914198357004","length":2004},"id":"ASB-A-204450605-d2d6789d"}],"fixes":["https://android.googlesource.com/kernel/common/+/f8d4f44df056c5b504b0d49683fb7279218fd207"],"severity":"High"},"database_specific":{"source":"https://storage.googleapis.com/android-osv/ASB-A-204450605.json"}}],"schema_version":"1.9.0"}