USN-3630-1: Linux kernel vulnerability
23 April 2018
linux, linux-raspi2 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.10
The system could be made to crash under certain conditions.
- linux - Linux kernel
- linux-raspi2 - Linux kernel for Raspberry Pi 2
It was discovered that the Broadcom UniMAC MDIO bus controller driver in the Linux kernel did not properly validate device resources. A local attacker could use this to cause a denial of service (system crash).
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 17.10
- linux-image-4.13.0-1017-raspi2 - 4.13.0-1017.18
- linux-image-4.13.0-39-generic - 4.13.0-39.44
- linux-image-4.13.0-39-generic-lpae - 4.13.0-39.44
- linux-image-4.13.0-39-lowlatency - 4.13.0-39.44
- linux-image-generic - 22.214.171.124.42
- linux-image-generic-lpae - 126.96.36.199.42
- linux-image-lowlatency - 188.8.131.52.42
- linux-image-raspi2 - 184.108.40.2067.15
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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.