This bug was fixed in the package linux-oem - 4.15.0-1043.48

---------------
linux-oem (4.15.0-1043.48) bionic; urgency=medium

  [ Ubuntu: 4.15.0-52.56 ]

  * Remote denial of service (resource exhaustion) caused by TCP SACK scoreboard
    manipulation (LP: #1831638)
    - SAUCE: tcp: tcp_fragment() should apply sane memory limits
  * Remote denial of service (system crash) caused by integer overflow in TCP
    SACK handling (LP: #1831637)
    - SAUCE: tcp: limit payload size of sacked skbs

 -- Stefan Bader <stefan.ba...@canonical.com>  Fri, 14 Jun 2019 10:39:16
+0200

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https://bugs.launchpad.net/bugs/1831840

Title:
  Support new ums-realtek device

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in linux-oem package in Ubuntu:
  New
Status in linux source package in Bionic:
  Incomplete
Status in linux-oem source package in Bionic:
  Fix Released
Status in linux source package in Cosmic:
  Incomplete
Status in linux-oem source package in Cosmic:
  Fix Released
Status in linux source package in Disco:
  Incomplete
Status in linux-oem source package in Disco:
  Fix Released

Bug description:
  [Impact]
  Realtek storage device uses usb-storage by default. It works but we should 
use ums-realtek to bring more functionality, e.g. enabling/disabling MMC card 
detection.

  [Fix]
  Add its device ID to the driver.

  [Test]
  After this patch applied, we can use enable_mmc module option to control MMC 
detection.

  [Regression Potential]
  Low. The scope is limited to one device, and the driver is quite stable.

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