Are my Red Hat Enterprise Linux kernels vulnerable to the June 30, 2007 hang due to the insertion of leap seconds?

Updated -

No, Red Hat kernels are not vulnerable to this hang.

Many users of upstream kernels encountered a system hang at exactly midnight on June 30, 2007. This was caused by a bug in the kernel's handling of leap second insertion, which evidently was wrongly triggered by NTP. The problem was introduced in the 2.6.19 kernel in the clock_was_set() function used when CONFIG_HIG...

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