jcp@phoenix64 ~ $ uname -a
Linux phoenix64 4.15.0 #1 SMP PREEMPT Mon Jan 29 14:51:33 CET 2018 x86_64 AMD Phenom(tm) II X6 1100T Processor AuthenticAMD GNU/Linux
jcp@phoenix64 ~ $ cat /sys/devices/system/cpu/vulnerabilities/*
Not affected
Vulnerable
Mitigation: Full AMD retpoline

Yannick@DESKTOP-AKFPCE1 MSYS ~
$ uname -a
MSYS_NT-10.0 DESKTOP-AKFPCE1 2.10.0(0.325/5/3) 2018-02-08 11:38 x86_64 Msys

babaorheum@gentoo-desktop ~/Bureau $ screenfetch  
         -/oyddmdhs+:.                babaorheum@gentoo-desktop
     -odNMMMMMMMMNNmhy+-`             OS: Gentoo  
   -yNMMMMMMMMMMMNNNmmdhy+-           Kernel: x86_64 Linux 4.15.2-gentoo
 `omMMMMMMMMMMMMNmdmmmmddhhy/`        Uptime: 1h 53m
 omMMMMMMMMMMMNhhyyyohmdddhhhdo`      Packages: 644
.ydMMMMMMMMMMdhs++so/smdddhhhhdm+`    Shell: bash 4.4.12
 oyhdmNMMMMMMMNdyooydmddddhhhhyhNd.   Resolution: 1920x1080
  :oyhhdNNMMMMMMMNNNmmdddhhhhhyymMh   DE: Mate
    .:+sydNMMMMMNNNmmmdddhhhhhhmMmy   CPU: AMD Ryzen 5 1600 Six-Core @ 3.2GHz
       /mMMMMMMNNNmmmdddhhhhhmMNhs:   RAM: 1470MiB / 16040MiB
    `oNMMMMMMMNNNmmmddddhhdmMNhs+`    
  `sNMMMMMMMMNNNmmmdddddmNMmhs/.      
 /NMMMMMMMMNNNNmmmdddmNMNdso:`        
+MMMMMMMNNNNNmmmmdmNMNdso/-          
MNNNNNNNmmmmmNNMmhs+/-`              
/hMMNNNNNNNNMNdhs++/-`                
`/ohdmmddhys+++/:.`                  
  `-//////:--.                        

cat /sys/devices/system/cpu/vulnerabilities/*
Not affected
Mitigation: __user pointer sanitization
Mitigation: Full AMD retpoline
jcp@phoenix64 ~ $ uname -a
Linux phoenix64 4.15.3 #1 SMP PREEMPT Mon Feb 12 22:31:32 CET 2018 x86_64 AMD Phenom(tm) II X6 1100T Processor AuthenticAMD GNU/Linux

./spectre-meltdown-checker.sh
Spectre and Meltdown mitigation detection tool v0.34
 
Checking for vulnerabilities on current system
Kernel is Linux 4.15.3 #1 SMP PREEMPT Mon Feb 12 22:31:32 CET 2018 x86_64
CPU is AMD Phenom(tm) II X6 1100T Processor
 
Hardware check
* Hardware support (CPU microcode) for mitigation techniques
  * Indirect Branch Restricted Speculation (IBRS)
    * SPEC_CTRL MSR is available:  UNKNOWN  (couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?)
    * CPU indicates IBRS capability:  NO  
  * Indirect Branch Prediction Barrier (IBPB)
    * PRED_CMD MSR is available:  UNKNOWN  (couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?)
    * CPU indicates IBPB capability:  NO  
  * Single Thread Indirect Branch Predictors (STIBP)
    * SPEC_CTRL MSR is available:  UNKNOWN  (couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?)
    * CPU indicates STIBP capability:  NO  
  * Enhanced IBRS (IBRS_ALL)
    * CPU indicates ARCH_CAPABILITIES MSR availability:  NO  
    * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability:  NO  
  * CPU explicitly indicates not being vulnerable to Meltdown (RDCL_NO):  NO  
  * CPU microcode is known to cause stability problems:  NO  
* CPU vulnerability to the three speculative execution attacks variants
  * Vulnerable to Variant 1:  YES  
  * Vulnerable to Variant 2:  YES  
  * Vulnerable to Variant 3:  NO  
 
CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Mitigated according to the /sys interface:  YES  (kernel confirms that the mitigation is active)
* Kernel has array_index_mask_nospec:  UNKNOWN  (couldn't check (couldn't find your kernel image in /boot, if you used netboot, this is normal))
* Checking count of LFENCE instructions following a jump in kernel:  UNKNOWN  (couldn't check (couldn't find your kernel image in /boot, if you used netboot, this is normal))
> STATUS:  NOT VULNERABLE  (Mitigation: __user pointer sanitization)
 
CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigated according to the /sys interface:  YES  (kernel confirms that the mitigation is active)
* Mitigation 1
  * Kernel is compiled with IBRS/IBPB support:  NO  
  * Currently enabled features
    * IBRS enabled for Kernel space:  NO  
    * IBRS enabled for User space:  NO  
    * IBPB enabled:  NO  
* Mitigation 2
  * Kernel compiled with retpoline option:  YES  
  * Kernel compiled with a retpoline-aware compiler:  YES  (kernel reports full retpoline compilation)
  * Retpoline enabled:  NO  
> STATUS:  NOT VULNERABLE  (Mitigation: Full AMD retpoline)
 
CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* Mitigated according to the /sys interface:  YES  (kernel confirms that your CPU is unaffected)
* Kernel supports Page Table Isolation (PTI):  NO  
* PTI enabled and active:  NO  
* Running as a Xen PV DomU:  NO  
> STATUS:  NOT VULNERABLE  (your CPU vendor reported your CPU model as not vulnerable)
 
A false sense of security is worse than no security at all, see --disclaimer

Linux asus-506802237 2.6.21.4-eeepc #2 Oct Mon 15 12:49:37 EDT 2007 i686 GNU/Linux

supported_distros="Alpine Linux, Antergos, Arch Linux (Old and Current Logos), BLAG, BunsenLabs, CentOS, Chakra, Chapeau, Chrome OS, Chromium OS, CrunchBang, CRUX, Debian, Deepin, Devuan, Dragora, elementary OS, Evolve OS, Exherbo, Fedora, Frugalware, Fuduntu, Funtoo, Fux, Gentoo, gNewSense, Jiyuu Linux, Kali Linux, KaOS, KDE neon, Kogaion, Korora, LinuxDeepin, Linux Mint, LMDE, Logos, Mageia, Mandriva/Mandrake, Manjaro, Mer, Netrunner, NixOS, openSUSE, Oracle Linux, Parabola GNU/Linux-libre, Pardus, Parrot Security, PCLinuxOS, PeppermintOS, Qubes OS, Raspbian, Red Hat Enterprise Linux, ROSA, Sabayon, SailfishOS, Scientific Linux, Slackware, Solus, SparkyLinux, SteamOS, SUSE Linux Enterprise, SwagArch, TinyCore, Trisquel, Ubuntu, Viperr and Void."
supported_other="Dragonfly/Free/Open/Net BSD, Haiku, Mac OS X, Windows+Cygwin and Windows+MSYS2."
supported_dms="KDE, GNOME, Unity, Xfce, LXDE, Cinnamon, MATE, Deepin, CDE, RazorQt and Trinity."
supported_wms="2bwm, 9wm, Awesome, Beryl, Blackbox, Cinnamon, chromeos-wm, Compiz, deepin-wm, dminiwm, dwm, dtwm, E16, E17, echinus, Emerald, FluxBox, FLWM, FVWM, herbstluftwm, howm, IceWM, KWin, Metacity, monsterwm, Musca, Gala, Mutter, Muffin, Notion, OpenBox, PekWM, Ratpoison, Sawfish, ScrotWM, SpectrWM, StumpWM, subtle, sway, TWin, WindowMaker, WMFS, wmii, Xfwm4, XMonad and i3."