{"schema_version":"1.9.0","id":"PUB-A-222644279","published":"2022-06-01T00:00:00Z","modified":"2026-09-08T15:39:03.104189951Z","aliases":["A-222644279","CVE-2021-20321"],"details":"In ovl_rename of dir.c, there is a possible out of bounds write due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.","affected":[{"package":{"name":":linux_kernel:","ecosystem":"Android"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":":0"},{"fixed":":2022-06-05"}]}],"versions":["Kernel"],"ecosystem_specific":{"fixes":["https://android.googlesource.com/kernel/common/+/9763ffd4da217"],"severity":"Moderate","spl":"2022-06-05","types":["EoP"],"vanir_signatures":[{"deprecated":false,"digest":{"line_hashes":["170151030005314084468002250654340021501","191377591384557818444932335513527703582","320489078532703007612407923827206644200","52680730438330849859458845665870418895","165911224448185019673959135544562250421","63521206055783656950898186562961463433"],"threshold":0.9},"id":"PUB-A-222644279-41d0db3e","signature_type":"Line","signature_version":"v1","source":"https://android.googlesource.com/kernel/common/+/9763ffd4da217","target":{"file":"fs/overlayfs/dir.c"}}]},"database_specific":{"source":"https://storage.googleapis.com/android-osv/PUB-A-222644279.json"}}],"references":[{"type":"ADVISORY","url":"https://source.android.com/security/bulletin/2022-06-01"},{"type":"FIX","url":"https://android.googlesource.com/kernel/common/+/9763ffd4da217"}]}