USN-3510-2: Linux kernel (Trusty HWE) vulnerabilities
08 December 2017
Several security issues were fixed in the Linux kernel.
- linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise ESM
USN-3510-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
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
The problem can be corrected by updating your system to the following package versions:
- linux-image-3.13.0-137-generic - 3.13.0-137.186~precise1
- linux-image-3.13.0-137-generic-lpae - 3.13.0-137.186~precise1
- linux-image-generic-lpae-lts-trusty - 184.108.40.206.127
- linux-image-generic-lts-trusty - 220.127.116.11.127
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.