==========================================================================
Kernel Live Patch Security Notice LSN-0033-1
December 07, 2017

linux vulnerability
==========================================================================

A security issue affects these releases of Ubuntu:

| Series           | Base kernel  | Arch     | flavors          |
|------------------+--------------+----------+------------------|
| Ubuntu 16.04 LTS | 4.4.0        | amd64    | generic          |
| Ubuntu 16.04 LTS | 4.4.0        | amd64    | lowlatency       |
| Ubuntu 14.04 LTS | 4.4.0        | amd64    | generic          |
| Ubuntu 14.04 LTS | 4.4.0        | amd64    | lowlatency       |

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

It was discovered that a race condition existed in the ALSA subsystem of
the Linux kernel when creating and deleting a port via ioctl(). A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-15265)

Update instructions:

The problem can be corrected by updating your livepatches to the following
versions:

| Kernel          | Version  | flavors                  |
|-----------------+----------+--------------------------|
| 4.4.0-101.124   | 33.2     | generic, lowlatency      |
| 4.4.0-21.37     | 33.2     | generic, lowlatency      |
| 4.4.0-22.39     | 33.2     | generic, lowlatency      |
| 4.4.0-22.40     | 33.2     | generic, lowlatency      |
| 4.4.0-24.43     | 33.2     | generic, lowlatency      |
| 4.4.0-28.47     | 33.2     | generic, lowlatency      |
| 4.4.0-31.50     | 33.2     | generic, lowlatency      |
| 4.4.0-34.53     | 33.2     | generic, lowlatency      |
| 4.4.0-36.55     | 33.2     | generic, lowlatency      |
| 4.4.0-38.57     | 33.2     | generic, lowlatency      |
| 4.4.0-42.62     | 33.2     | generic, lowlatency      |
| 4.4.0-43.63     | 33.2     | generic, lowlatency      |
| 4.4.0-45.66     | 33.2     | generic, lowlatency      |
| 4.4.0-47.68     | 33.2     | generic, lowlatency      |
| 4.4.0-51.72     | 33.2     | generic, lowlatency      |
| 4.4.0-53.74     | 33.2     | generic, lowlatency      |
| 4.4.0-57.78     | 33.2     | generic, lowlatency      |
| 4.4.0-59.80     | 33.2     | generic, lowlatency      |
| 4.4.0-62.83     | 33.2     | generic, lowlatency      |
| 4.4.0-63.84     | 33.2     | generic, lowlatency      |
| 4.4.0-64.85     | 33.2     | generic, lowlatency      |
| 4.4.0-66.87     | 33.2     | generic, lowlatency      |
| 4.4.0-67.88     | 33.2     | generic, lowlatency      |
| 4.4.0-70.91     | 33.2     | generic, lowlatency      |
| 4.4.0-71.92     | 33.2     | generic, lowlatency      |
| 4.4.0-72.93     | 33.2     | generic, lowlatency      |
| 4.4.0-75.96     | 33.2     | generic, lowlatency      |
| 4.4.0-77.98     | 33.2     | generic, lowlatency      |
| 4.4.0-78.99     | 33.2     | generic, lowlatency      |
| 4.4.0-79.100    | 33.2     | generic, lowlatency      |
| 4.4.0-81.104    | 33.2     | generic, lowlatency      |
| 4.4.0-83.106    | 33.2     | generic, lowlatency      |
| 4.4.0-87.110    | 33.2     | generic, lowlatency      |
| 4.4.0-89.112    | 33.2     | generic, lowlatency      |
| 4.4.0-91.114    | 33.2     | generic, lowlatency      |
| 4.4.0-92.115    | 33.2     | generic, lowlatency      |
| 4.4.0-93.116    | 33.2     | generic, lowlatency      |
| 4.4.0-96.119    | 33.2     | generic, lowlatency      |
| 4.4.0-97.120    | 32.2     | generic, lowlatency      |
| 4.4.0-97.120    | 33.2     | generic, lowlatency      |
| 4.4.0-98.121    | 33.2     | generic, lowlatency      |
| lts-4.4.0-101.124_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-21.37_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-22.39_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-22.40_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-24.43_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-28.47_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-31.50_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-34.53_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-36.55_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-38.57_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-42.62_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-45.66_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-47.68_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-51.72_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-53.74_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-57.78_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-59.80_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-62.83_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-63.84_14.04.2-lts-xenial | 14.04.2  | generic, lowlatency      |
| lts-4.4.0-64.85_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-66.87_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-67.88_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-70.91_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-71.92_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-72.93_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-75.96_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-78.99_14.04.2-lts-xenial | 14.04.2  | generic, lowlatency      |
| lts-4.4.0-79.100_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-81.104_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-83.106_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-87.110_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-89.112_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-91.114_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-92.115_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-93.116_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-96.119_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-97.120_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |
| lts-4.4.0-98.121_14.04.1-lts-xenial | 14.04.1  | generic, lowlatency      |

Additionally, you should install an updated kernel with these fixes and
reboot at your convienience.

References:
  CVE-2017-1000405, CVE-2017-15265, CVE-2017-16939

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