{"id":"ASB-A-205729183","details":"In GKI_getbuf of gki_buffer.cc, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.","aliases":["A-205729183","CVE-2021-39675"],"modified":"2026-09-18T15:47:37.392928379Z","published":"2022-02-01T00:00:00Z","references":[{"type":"ADVISORY","url":"https://source.android.com/security/bulletin/2022-02-01"},{"type":"FIX","url":"https://android.googlesource.com/platform/system/nfc/+/fef77a189022aa7ac53136e582a1444b1d2ef5f0"}],"affected":[{"package":{"name":"platform/system/nfc","ecosystem":"Android"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"12:0"},{"fixed":"12:2022-02-01"}]}],"versions":["12"],"ecosystem_specific":{"spl":"2022-02-01","types":["EoP"],"vanir_signatures":[{"target":{"file":"src/gki/common/gki_buffer.cc"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["288390722114287778546768584513148725603","31791538175672348154770622817844970845","233694777456824859479542176992205686209","53136747502931177756999941870448979321","227678348486699828512464673817066811975","251177702116177346323361254365922307350","252357863778430228943175558416913079077"]},"id":"ASB-A-205729183-2f53f16c","signature_type":"Line","signature_version":"v1","source":"https://android.googlesource.com/platform/system/nfc/+/92646b7ffc155efec6e9ed2e0753c6e62fb5ff6b"},{"target":{"function":"GKI_getbuf","file":"src/gki/common/gki_buffer.cc"},"deprecated":false,"digest":{"length":2844,"function_hash":"262860658969548968702594415238425075122"},"id":"ASB-A-205729183-aee00831","signature_type":"Function","signature_version":"v1","source":"https://android.googlesource.com/platform/system/nfc/+/92646b7ffc155efec6e9ed2e0753c6e62fb5ff6b"}],"fixes":["https://android.googlesource.com/platform/system/nfc/+/92646b7ffc155efec6e9ed2e0753c6e62fb5ff6b"],"severity":"Critical"},"database_specific":{"source":"https://storage.googleapis.com/android-osv/ASB-A-205729183.json"}}],"schema_version":"1.9.0"}