Stretch kernel vulnerable to meltdown

["Peter Steinmetz" <peter.steinmetz.1@gmx.net>]

Hi,
 
according to this
https://security-tracker.debian.org/tracker/CVE-2017-5754
 
this kernel
# uname -rv
4.9.0-6-amd64 #1 SMP Debian 4.9.82-1+deb9u3 (2018-03-02)
 
should be fixed wrt meltdown. But I see this
# grep -R . /sys/devices/system/cpu/vulnerabilities/
/sys/devices/system/cpu/vulnerabilities/spectre_v2:Mitigation: Full generic retpoline
/sys/devices/system/cpu/vulnerabilities/spectre_v1:Mitigation: __user pointer sanitization
/sys/devices/system/cpu/vulnerabilities/meltdown:Vulnerable

Why / what am I missing?

TIA, Peter