In several functions of the V8 library, there is a possible use after free due to a race condition. This could lead to remote code execution in an unprivileged process with no additional execution privileges needed. User interaction is not needed for exploitation.
android.googlesource.com/platform/external/chromium-libpac/+/438381db24b83e6fde76a4ca2c6a9fa91f822265
android.googlesource.com/platform/external/v8/+/2dc3777900fe5faa900be436bf42dd55353d189a
android.googlesource.com/platform/external/v8/+/6e1e26aaeffbc3b396c54fc4f3d2605b9d4cab67
source.android.com/security/bulletin/2021-07-01