{"id":"PUB-A-222644279","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.","aliases":["A-222644279","CVE-2021-20321"],"modified":"2026-03-11T06:37:35.025128Z","published":"2022-06-01T00:00:00Z","references":[{"type":"ADVISORY","url":"https://source.android.com/security/bulletin/2022-06-01"},{"type":"FIX","url":"https://android.googlesource.com/kernel/common/+/9763ffd4da217"}],"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"],"spl":"2022-06-05","vanir_signatures":[{"target":{"file":"fs/overlayfs/dir.c"},"signature_version":"v1","signature_type":"Line","id":"PUB-A-222644279-41d0db3e","deprecated":false,"source":"https://android.googlesource.com/kernel/common/+/9763ffd4da217","digest":{"line_hashes":["170151030005314084468002250654340021501","191377591384557818444932335513527703582","320489078532703007612407923827206644200","52680730438330849859458845665870418895","165911224448185019673959135544562250421","63521206055783656950898186562961463433"],"threshold":0.9}}],"types":["EoP"],"severity":"Moderate"},"database_specific":{"source":"https://storage.googleapis.com/android-osv-test/PUB-A-222644279.json"}}],"schema_version":"1.7.5"}