USN-3207-1: Linux kernel vulnerabilities
22 February 2017
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
It was discovered that a use-after-free vulnerability existed in the block
device layer of the Linux kernel. A local attacker could use this to cause
a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2016-7910)
Dmitry Vyukov discovered a use-after-free vulnerability in the
sys_ioprio_get() function in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2016-7911)
Andrey Konovalov discovered a use-after-free vulnerability in the DCCP
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2017-6074)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 14.04
-
linux-image-3.13.0-110-generic
-
3.13.0-110.157
-
linux-image-3.13.0-110-generic-lpae
-
3.13.0-110.157
-
linux-image-3.13.0-110-lowlatency
-
3.13.0-110.157
-
linux-image-3.13.0-110-powerpc-e500
-
3.13.0-110.157
-
linux-image-3.13.0-110-powerpc-e500mc
-
3.13.0-110.157
-
linux-image-3.13.0-110-powerpc-smp
-
3.13.0-110.157
-
linux-image-3.13.0-110-powerpc64-emb
-
3.13.0-110.157
-
linux-image-3.13.0-110-powerpc64-smp
-
3.13.0-110.157
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.