{"id":"PUB-A-197850306","details":"In get_signal_page of signal.c, there is a possible leak of kernel data due to uninitialized data. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.","aliases":["A-197850306","CVE-2021-21781"],"modified":"2026-04-10T16:16:18.068628Z","published":"2022-03-01T00:00:00Z","references":[{"type":"ADVISORY","url":"https://source.android.com/security/bulletin/2022-03-01"},{"type":"FIX","url":"https://android.googlesource.com/kernel/common/+/9c698bff66ab4914bb3d71da7dc6112519bde23e"}],"affected":[{"package":{"name":":linux_kernel:","ecosystem":"Android"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":":0"},{"fixed":":2022-03-05"}]}],"versions":["Kernel"],"ecosystem_specific":{"vanir_signatures":[{"target":{"file":"arch/arm/kernel/signal.c","function":"get_signal_page"},"signature_version":"v1","digest":{"length":434,"function_hash":"339938110582185630156828205763765012574"},"signature_type":"Function","id":"PUB-A-197850306-924ef2dd","deprecated":false,"source":"https://android.googlesource.com/kernel/common/+/9c698bff66ab4914bb3d71da7dc6112519bde23e"},{"target":{"file":"arch/arm/kernel/signal.c"},"signature_version":"v1","digest":{"threshold":0.9,"line_hashes":["172204053961297124746774733749632148791","58795547544708646071616854173628155454","78885293706127269740668196881614618451","282123551804674408836246440921981886827","50806308092549919788233337242074328280","89133989655327505921688482792177943628","296969725280413361612768861898306249329","36271020927615339050770287798758887251"]},"signature_type":"Line","id":"PUB-A-197850306-bf7555fa","deprecated":false,"source":"https://android.googlesource.com/kernel/common/+/9c698bff66ab4914bb3d71da7dc6112519bde23e"}],"types":["ID"],"spl":"2022-03-05","severity":"Moderate","fixes":["https://android.googlesource.com/kernel/common/+/9c698bff66ab4914bb3d71da7dc6112519bde23e"]},"database_specific":{"source":"https://storage.googleapis.com/android-osv/PUB-A-197850306.json"}}],"schema_version":"1.7.5"}