It's unclear if the security fixes relate to further closure of jailbreak vulnerabilities. While the sources said the new release will include iPhone, iPad and iPod touch, it's unclear if this means the Verizon iPhone will get a 4.3.x release, finally.
The Verizon iPhone has been stuck on 4.2.6 since just after launch.
The update is expected to arrive in just a few weeks, the report said. Apple released iOS 4.3.1, another bug fix release, near the end of March. That release also closed a jailbreak vulnerability.