Uh oh. If you own Samsung phone, you'll definitely want to read this. There is an exploit out there that can allow Android malware apps gain access to your device's physical memory and steal and/or delete all of your data. Here is a breakdown from Gizmodo:
The exploit was found by a user called Alephzain who was able to use it to root his Samsung Galaxy S III, but the flaw also extends to a number of Samsung phones, all of which have certain Exynos processors, a key element to using the exploit.
Meanwhile, another user called Chainfire has built an application file that utilize the "ExynosAbuse" to root the following devices:
Samsung Galaxy S2 GT-I9100
Samsung Galaxy S3 GT-I9300
Samsung Galaxy S3 LTE GT-I9305
Samsung Galaxy Note GT-N7000
Samsung Galaxy Note 2 GT-N7100
Verizon Galaxy Note 2 SCH-I605 (locked bootloaders)
Samsung Galaxy Note 10.1 GT-N8000
Samsung Galaxy Note 10.1 GT-N8010
If you own the Nexus 10, by chance, you're in luck. Since the device has a Exynos 5 chip instead of a Extnos 4, it is safe.