USN-3508-1: Linux kernel vulnerabilities
07 December 2017
Several security issues were fixed in the Linux kernel.
- linux - Linux kernel
- linux-raspi2 - Linux kernel for Raspberry Pi 2
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
Yonggang Guo discovered that a race condition existed in the driver
subsystem in the Linux kernel. A local attacker could use this to possibly
gain administrative privileges. (CVE-2017-12146)
The problem can be corrected by updating your system to the following package versions:
- linux-image-4.10.0-1023-raspi2 - 4.10.0-1023.26
- linux-image-4.10.0-42-generic - 4.10.0-42.46
- linux-image-4.10.0-42-generic-lpae - 4.10.0-42.46
- linux-image-4.10.0-42-lowlatency - 4.10.0-42.46
- linux-image-generic - 126.96.36.199.42
- linux-image-generic-lpae - 188.8.131.52.42
- linux-image-lowlatency - 184.108.40.206.42
- linux-image-raspi2 - 220.127.116.113.24
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.