CVE-2021-39623: Google Android

Critical severity, CVSS 9.8. EPSS: 2% chance of exploitation in the next 30 days.

In doRead of SimpleDecodingSource.cpp, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12 Android-9Android ID: A-194105348

Affected products

• Google Android: version 9.0 only; version 10.0 only; version 11.0 only; version 12.0 only

Published 2022-01-14. Last modified 2026-06-17.