Over the weekend, a bug was discovered by XDA-Developer forum members that showed that Samsung devices running Exynos processors could be hacked with a kernal-level exploit. In other words, a serious vulnerability. Samsung has told Android Central that they intend to fix this bug as quickly as possible, an important thing when there are so many vulnerable devices running around.
Samsung is aware of the potential security issue related to the Exynos processor and plans to provide a software update to address it as quickly as possible.
The issue may arise only when a malicious application is operated on the affected devices; however, this does not affect most devices operating credible and authenticated applications.
Samsung will continue to closely monitor the situation until the software fix has been made available to all affected mobile devices.
In the meantime, Samsung suggests that users only use official markets to limit their exposure, though it doesn't make them completely safe. With spam botnets making the rounds via sketchy apps, it's important that Samsung get this fixed up quickly.