Security flaws which could give hackers complete access to a smartphone have been found in the microchips of millions of Android devices, researchers claim.
Computer security firm Check Point told a hacking convention in the US it has found a bug - which it calls QuadRooter - that could affect up to 900 million Android phones, including some made by BlackBerry, Google and LG among others.
It is caused by vulnerabilities in the processor chips used in those phones by US firm Qualcomm. However, there is no evidence that the issue has yet been used by cyber criminals.
According to Check Point, if a malicious app installed on the affected phones could exploit the vulnerabilities, it could "give attackers complete control of devices and unrestricted access to sensitive personal and enterprise data on them".
The alleged weakness is believed already to be the subject of a fix, or 'patch', being created by Qualcomm to remove the issue. The chip-maker is yet to officially comment on the issue.
Check Point encouraged users to keep their phone's software up to date in order to keep it secure, and said it has created a free app called QuadRooter Scanner to check whether a phone is at risk.