2.6.32-896.16.1.lve1.4.51.el6.x86_64 #1 SMP Wed Jan 17 13:19:23 EST 2018 x86_64 x86_64 x86_64 GNU/Linux
I believe in the past this kernel was supposed to not be vulnerable to Spectre Variant 1 however when I run the following checker:
CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Kernel has array_index_mask_nospec: NO
* Checking count of LFENCE instructions following a jump in kernel: NO (only 23 jump-then-lfence instructions found, should be >= 30 (heuristic))
> STATUS: VULNERABLE (Kernel source needs to be patched to mitigate the vulnerability)
Is this a false alarm or is this kernel vulnerable? I ran a yum update and installed the latest kernel and rebooted.