Google has issued a critical security update for Android that affects the Bluetooth functionality on about two-thirds of all Android devices now in use.

The vulnerability, CVE-2020-0022, affects devices running Android Oreo (8.0 and 8.1) and Pie (9.0) and can allow remote code execution without any user interaction. The flaw was found and reported to Google three months ago by the German security firm ERNW with a patch being issued last week. However, any devices not updated remain vulnerable through their Bluetooth connectivity.

ERNW found that devices running Android 8.0 through 9.0 can be accessed by a nearby malicious actor who can exploit the flaw to run code or remove data without the device owner having to take any action to help the attack. The attacker does need to know the Bluetooth MAC address of the device being assaulted, but this can often be deduced from the local WiFi Mac address.

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