USN-2738-1: Linux kernel vulnerability
9 September 2015
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 15.04
The system could be made to crash or run programs as an administrator.
- linux - Linux kernel
It was discovered that an integer overflow error existed in the SCSI generic (sg) driver in the Linux kernel. A local attacker with write permission to a SCSI generic device could use this to cause a denial of service (system crash) or potentially escalate their privileges.
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 15.04
- linux-image-3.19.0-28-generic - 3.19.0-28.30
- linux-image-3.19.0-28-generic-lpae - 3.19.0-28.30
- linux-image-3.19.0-28-lowlatency - 3.19.0-28.30
- linux-image-3.19.0-28-powerpc-e500mc - 3.19.0-28.30
- linux-image-3.19.0-28-powerpc-smp - 3.19.0-28.30
- linux-image-3.19.0-28-powerpc64-emb - 3.19.0-28.30
- linux-image-3.19.0-28-powerpc64-smp - 3.19.0-28.30
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. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.