USN-3221-1: Linux kernel vulnerability
8 March 2017
The system could be made to crash or run programs as an administrator.
Releases
Packages
- linux - Linux kernel
- linux-raspi2 - Linux kernel for Raspberry Pi 2
Details
Alexander Popov discovered that the N_HDLC line discipline implementation
in the Linux kernel contained a double-free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or possibly gain
administrative privileges.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.10
-
linux-image-powerpc-smp
-
4.8.0.41.52
-
linux-image-powerpc-e500mc
-
4.8.0.41.52
-
linux-image-4.8.0-41-generic
-
4.8.0-41.44
-
linux-image-generic-lpae
-
4.8.0.41.52
-
linux-image-4.8.0-1028-raspi2
-
4.8.0-1028.31
-
linux-image-4.8.0-41-powerpc64-emb
-
4.8.0-41.44
-
linux-image-4.8.0-41-powerpc-e500mc
-
4.8.0-41.44
-
linux-image-lowlatency
-
4.8.0.41.52
-
linux-image-4.8.0-41-generic-lpae
-
4.8.0-41.44
-
linux-image-generic
-
4.8.0.41.52
-
linux-image-4.8.0-41-powerpc-smp
-
4.8.0-41.44
-
linux-image-powerpc64-emb
-
4.8.0.41.52
-
linux-image-raspi2
-
4.8.0.1028.31
-
linux-image-4.8.0-41-lowlatency
-
4.8.0-41.44
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.
References
Related notices
- USN-3220-2: linux-lts-xenial, linux-image-4.4.0-66-lowlatency, linux-image-extra-4.4.0-66-generic, linux-image-4.4.0-66-generic-lpae, linux-image-4.4.0-66-powerpc64-emb, linux-image-4.4.0-66-powerpc-e500mc, linux-image-4.4.0-66-powerpc64-smp, linux-image-4.4.0-66-powerpc-smp, linux-image-4.4.0-66-generic
- USN-3220-1: linux-image-4.4.0-1005-gke, linux-image-4.4.0-1046-raspi2, linux-image-extra-4.4.0-1005-gke, linux-image-4.4.0-1050-snapdragon, linux-image-4.4.0-66-lowlatency, linux-image-extra-4.4.0-66-generic, linux-image-4.4.0-66-generic-lpae, linux, linux-image-4.4.0-66-powerpc64-emb, linux-image-4.4.0-66-powerpc-e500mc, linux-image-4.4.0-66-powerpc64-smp, linux-raspi2, linux-gke, linux-image-4.4.0-66-powerpc-smp, linux-image-4.4.0-66-generic, linux-snapdragon
- USN-3220-3: linux-image-4.4.0-1007-aws, linux-aws
- USN-3221-2: linux-image-4.8.0-41-generic, linux-hwe, linux-image-extra-4.8.0-41-generic, linux-image-4.8.0-41-generic-lpae, linux-image-4.8.0-41-lowlatency
- USN-3219-1: linux-image-3.13.0-112-powerpc-e500, linux-image-3.13.0-112-powerpc64-smp, linux-image-3.13.0-112-powerpc-smp, linux-image-3.13.0-112-generic, linux-image-3.13.0-112-generic-lpae, linux-image-3.13.0-112-lowlatency, linux, linux-image-extra-3.13.0-112-generic, linux-image-3.13.0-112-powerpc-e500mc, linux-image-3.13.0-112-powerpc64-emb
- USN-3219-2: linux-image-3.13.0-112-generic, linux-image-3.13.0-112-generic-lpae, linux-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty
- USN-3218-1: linux-image-powerpc-smp, linux-image-3.2.0-124-generic-pae, linux-image-omap, linux-image-3.2.0-124-highbank, linux-image-virtual, linux-image-omap4, linux-image-highbank, linux-image-3.2.0-124-generic, linux-image-3.2.0-124-omap, linux, linux-image-3.2.0-124-powerpc-smp, linux-image-3.2.0-124-virtual, linux-image-3.2.0-1502-omap4, linux-image-generic-pae, linux-image-generic, linux-image-powerpc64-smp, linux-ti-omap4, linux-image-3.2.0-124-powerpc64-smp