KernelCare Blog

KernelCare Blog

by / Friday, 23 October 2015
Friday Humor, Episode 2.

Servers always reboot at the wrong time!

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by / Friday, 09 October 2015
Friday Humor, Episode 1

Every time you reboot a server, a kitten dies!

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by / Friday, 13 March 2015
KernelCare protection against Rowhammer privilege escallation

The rmemory hardware issue "Rowhammer" was recently discovered to allows privileged escalation. The issue can be mitigated (at least in its current form) by preventing user from reading /proc/$(pid)/pagemap, /proc/kpageflags, /proc/kpagecount files. Yet, this protection is not available from...

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by / Thursday, 05 March 2015
KernelCare: How does it work?

Rebooting is a pain

Rebooting server is a pain. It is often scheduled for the darkest of the night. It requires minutes of downtime, and it can take up to 15 minutes for the server performance to stabilize, and catches to warm up. This is not something you want to do often.Yet, any time there...

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by / Monday, 05 January 2015
KernelCare support for Ubuntu 14.04 LTS (Trusty Tahr) added

We have added KernelCare support for Ubuntu 14.04 LTS (Trusty Tahr)

As of now we support:
RHEL/CentOS 5, 6 & 7
CloudLinux 5, 6, 5hybrid
Debian 6, 7
Ubuntu 14.04

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by / Thursday, 18 December 2014
KernelCare local privilege escalation patch for PCS/OpenVZ/CL6/CL5h/CentOS6/RHEL6 CVE-2014-9322

This update includes patch for CVE-2014-9322 vulnerability. I am sorry about unusual delay with this patch. This patch was the most complex patch we have seen so far. It was in assembler code, while most patches are in C. It was altering how interrupt handlers work. It is highly unusual, and...

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by / Thursday, 18 December 2014
KernelCare CVE-2014-9322 patch

Update: The patch has been released on Dec 18, 2014 at 1pm ET. You can read more about it here: http://www.cloudlinux.com/blog/clnews/kernelcare-local-privilege-escalation-patch-for-pcsopenvzcl6cl5hcentos.php

We have received numerous requests for CVE-2014-9322 patch. Right now we are running...

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by / Tuesday, 02 December 2014
KernelCare support for Debian 7 added
Debian 7 (64bit) was added to the list of supported Linux distributions.
We now support:
RHEL/CentOS 5, 6 & 7
CloudLinux 5, 6, 5hybrid
Debian 6, 7

We plan to add Ubuntu support in the next few weeks.

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by / Monday, 10 November 2014
We're looking for KernelCare testimonials
If you are using KernelCare, you can help us. We are looking for KernelCare testimonials to display on our kernelcare.com website. We need:

  • Your name & title
  • Your picture
  • Company name
  • Few sentences about how you are using KernelCare, and why you like it.
Please, send testimonials to This email...

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by / Friday, 17 October 2014
KernelCare: Patches for CentOS/RHEL/CloudLinux 6 and PCS/Virtuozzo/OpenVZ kernels

[This patchset was re-released on Oct 21st with a fix for people running e1000e cards]

CentOS/RHEL/CloudLinux 6 kernels, as well as PCS/Virtuozzo/OpenVZ and CloudLinux 5 hybrid kernels were patched against multiple vulnerabilities fixed in RHEL 2.6.32-504 kernel.

Systems with AUTO_UPDATE=True...

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