{"id":"CVE-2021-0520","aliases":["A-176237595","ASB-A-176237595","EUVD-2021-3139","GHSA-pmm6-qxj3-9jr6"],"status":"published","title":"In several functions of MemoryFileSystem.cpp and related files, there is a possible use after...","description":"In several functions of MemoryFileSystem.cpp and related files, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-10Android ID: A-176237595","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00175,"percentile":0.07033,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-362","CWE-416"],"published":"2021-06-01T00:00:00Z","modified":"2026-11-05T16:32:28Z","exploits":[{"source":"pocgithub","id":"nanopathi/frameworks_av_AOSP10_r33_CVE-2021-0520","title":"nanopathi/frameworks_av_AOSP10_r33_CVE-2021-0520","date":"2022-04-07","url":"https://github.com/nanopathi/frameworks_av_AOSP10_r33_CVE-2021-0520"},{"source":"pocgithub","id":"ShaikUsaf/frameworks_av_AOSP10_r33_CVE-2021-0520","title":"ShaikUsaf/frameworks_av_AOSP10_r33_CVE-2021-0520","date":"2022-07-25","url":"https://github.com/ShaikUsaf/frameworks_av_AOSP10_r33_CVE-2021-0520"}],"fixes":[{"ecosystem":"Android","package":"platform/frameworks/av","fixed_in":["10:2021-06-01","11:2021-06-01"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Android","package":"platform/frameworks/av","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"10:0"},{"fixed":"10:2021-06-01"}]}],"versions":["10"]},{"source":"osv","ecosystem":"Android","package":"platform/frameworks/av","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"11:0"},{"fixed":"11:2021-06-01"}]}],"versions":["11"]}],"products":[{"vendor":"google","product":"android"}],"references":[{"url":"https://source.android.com/security/bulletin/2021-06-01","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-0520"},{"url":"https://github.com/advisories/GHSA-pmm6-qxj3-9jr6"},{"url":"https://android.googlesource.com/platform/frameworks/av/+/3b1141d44f448ea9a528ff8af8f128686c35039d","tags":["fix"]}],"sources":{"cve":[{"id":"CVE-2021-0520","description":"In several functions of MemoryFileSystem.cpp and related files, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-10Android ID: A-176237595","status":"published","published":"2021-06-21T16:01:31Z","modified":"2024-08-03T15:40:01.272Z","updated_at":"2026-11-02T14:33:10.887946Z"}],"euvd":[{"id":"EUVD-2021-3139","description":"In several functions of MemoryFileSystem.cpp and related files, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-10Android ID: A-176237595","status":"published","published":"2021-06-21T16:01:31Z","modified":"2024-08-03T15:40:01Z","updated_at":"2026-11-03T03:25:16.987587Z"}],"ghsa":[{"id":"GHSA-pmm6-qxj3-9jr6","title":"In several functions of MemoryFileSystem.cpp and related files, there is a possible use after...","description":"In several functions of MemoryFileSystem.cpp and related files, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-10Android ID: A-176237595","status":"published","published":"2022-05-24T19:05:44Z","modified":"2023-01-29T05:07:03Z","cwes":["CWE-362"],"updated_at":"2026-11-02T14:46:08.723565Z"}],"nvd":[{"id":"CVE-2021-0520","description":"In several functions of MemoryFileSystem.cpp and related files, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-10Android ID: A-176237595","status":"published","published":"2021-06-21T17:15:08.623Z","modified":"2026-06-17T03:30:14.483Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.4,"vector":"AV:L/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-362","CWE-416"],"updated_at":"2026-11-02T14:06:54.892562Z"}],"osv":[{"id":"ASB-A-176237595","description":"In several functions of MemoryFileSystem.cpp and related files, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.","status":"published","published":"2021-06-01T00:00:00Z","modified":"2026-11-10T17:02:23.040266809Z","updated_at":"2026-11-10T17:35:04.393608Z"}]}}