This issue may be resolved by providing a newer version of
networkmanager (>= 0.9.10.2)
In this version a patch was introduced to mitigate CVE-2015-2922 (don't allow
setting the HL smaller than it was before)
This patch also makes sure a HL < 10 does not get set.
[ 1 ] The changelog of version 0.9.10.2
http://www.pro-linux.de/sicherheit/2/print/30542/index.html
[ 2 ] CVE-2015-2922 kernel: denial of service (DoS) attack against IPv6 network
stacks due to improper handling of Router Advertisements.
https://access.redhat.com/security/cve/CVE-2015-2922
** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2015-2922
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https://bugs.launchpad.net/bugs/1450066
Title:
IPv6 hop limit set to 0
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