This bug was fixed in the package linux-hwe - 4.15.0-54.58~16.04.1

---------------
linux-hwe (4.15.0-54.58~16.04.1) xenial; urgency=medium

  * linux-hwe: 4.15.0-54.58~16.04.1 -proposed tracker (LP: #1833986)

  [ Ubuntu: 4.15.0-54.58 ]

  * linux: 4.15.0-54.58 -proposed tracker (LP: #1833987)
  * Remote denial of service (resource exhaustion) caused by TCP SACK scoreboard
    manipulation (LP: #1831638) // CVE-2019-11478
    - tcp: refine memory limit test in tcp_fragment()
  * CVE-2019-11479
    - SAUCE: tcp: add tcp_min_snd_mss sysctl
    - SAUCE: tcp: enforce tcp_min_snd_mss in tcp_mtu_probing()

 -- Kleber Sacilotto de Souza <kleber.so...@canonical.com>  Mon, 24 Jun
2019 14:29:19 +0200

** Changed in: linux-hwe (Ubuntu Xenial)
       Status: New => Fix Released

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2019-11478

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2019-11479

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  linux-hwe: 4.15.0-54.58~16.04.1 -proposed tracker

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