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How to update your kernel for Meltdown (LMDE)

Posted: Wed Jan 10, 2018 6:37 am
by xenopeek
To upgrade your kernel right now to fix Meltdown (variant 3), these are the general instructions. The patches for Spectre (variant 1 and 2) aren't available yet.

Make sure you have also updated your web browser and you're running Firefox version 57.0.4 or newer, as that has mitigation that makes it impossible for JavaScript on websites to exploit these bugs. Average home users only run untrusted code in their web browser so this mitigation is key to being safe from these bugs.

For more information also see Security notice: Meltdown and Spectre

Instructions for LMDE 2:
  • Find the level 4 security updates for packages Linux kernel 3.16.51-3+deb8u1 and linux-libc-dev; they should have a new version 3.16.51-3+deb8u1 or newer
  • Mark them for installation and install them; I'd suggest you install all level 4 Linux updates
  • Reboot your system
In short, right now you should be using kernel 3.16.51-3+deb8u1 or newer.

Re: How to update your kernel for Meltdown (LMDE)

Posted: Tue Jan 23, 2018 12:02 pm
by pjc123
I updated my LMDE install, but the only selectable kernel in GRUB and in the boot directory is 3.16.0-5-amd64. Further investigation shows:

uname -a:
<machine name removed> 3.16.0-5-amd64 #1 SMP Debian 3.16.51-3+deb8u1 (2018-01-08) x86_64 GNU/Linux

From what I discovered:

kernel release (uname -r) = 3.16.0-5-amd64
kernel version (uname -v) = #1 SMP Debian 3.16.51-3+deb8u1 (2018-01-08)

So, I searched around, and I am still confused about the difference between these kernels and which one is actually running?

Re: How to update your kernel for Meltdown (LMDE)

Posted: Tue Jan 23, 2018 2:38 pm
by Harfud
pjc123 wrote:I updated my LMDE install, but the only selectable kernel in GRUB and in the boot directory is 3.16.0-5-amd64. Further investigation shows:

uname -a:
<machine name removed> 3.16.0-5-amd64 #1 SMP Debian 3.16.51-3+deb8u1 (2018-01-08) x86_64 GNU/Linux

From what I discovered:

kernel release (uname -r) = 3.16.0-5-amd64
kernel version (uname -v) = #1 SMP Debian 3.16.51-3+deb8u1 (2018-01-08)

So, I searched around, and I am still confused about the difference between these kernels and which one is actually running?
I return precisely the same results as you, with the exception that I also have 3.16.04 selectable in GRUB (I always leave a second kernel)

On boot I get booting kernel 3.16.0-5

See here: https://packages.debian.org/search?keyw ... image-3.16

I believe 3.16.0-5 to be the kernel package number and 3.16.51-3+deb8u1 to be the kernel number

Re: How to update your kernel for Meltdown (LMDE)

Posted: Thu Feb 22, 2018 12:46 pm
by c30zD
xenopeek wrote:
Wed Jan 10, 2018 6:37 am
  • Mark them for installation and install them; I'd suggest you install all level 4 Linux updates
I have a question regarding the level 4 updates. As they are suggested to be installed one by one, what would be the ideal way to install them? For example, should I install first the Linux kernel 3.16.51-3+deb8u1 and linux-libc-dev packages or should I install linux-3.16.0-4-common first or linux-3.16.0-4-amd64...? What is the recommended way?

These are the packages shown by the Update Manager (the ones without formatting are the actual packages to be installed):

linux-3.16.0-4-amd64
linux-headers-3.16.0-4-amd64
linux-image-3.16.0-4-amd64

linux-3.16.0-4-common
linux-headers-3.16.0-4-common

linux-amd64
linux-headers-amd64
linux-image-amd64

Linux kernel 3.16.51-3+deb8u1
linux-compiler-gcc-4.8-x86

linux-libc-dev

linux-tools
linux-kbuild-3.16

mesa
libgbm1
libgl1-mesa-dri
libopenvg1-mesa
libxatracker2

xorg-server
xserver-common
xserver-xorg-core
xwayland

xserver-xorg-video-modesetting