Samsung has begun to address a flaw with its Exynos processor, which leaves devices like the flagship Galaxy S3 exposed to hackers

From Techradar:

The vulnerability first identified in mid-December, concerns devices running the company's custom Exynos 4 processor.The flaw left the handset's physical memory (RAM) exposed and, potentially, allowed hackers to glean data or even send malware to the device.Samsung promised a fix when the issue was uncovered by members of the XDA Developers forum and that fix has now rolled out to Galaxy S3 users in the UK.

Samsung rolls out fix for Galaxy S3 security flaw, sudden death issue