Details

USN-3522-1 fixed a vulnerability in the Linux kernel to address

Meltdown (CVE-2017-5754). Unfortunately, that update introduced

a regression where a few systems failed to boot successfully. This

update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution

and indirect branch prediction may allow unauthorized memory reads via

sidechannel attacks. This flaw is known as Meltdown. A local attacker could

use this to expose sensitive information, including kernel memory.