USN-3779-1: Linux kernel vulnerabilities

2 October 2018

linux vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 ESM


Several security issues were fixed in the Linux kernel.

Software Description

  • linux - Linux kernel


It was discovered that an integer overflow vulnerability existed in the Linux kernel when loading an executable to run. A local attacker could use this to gain administrative privileges. (CVE-2018-14634)

It was discovered that a stack-based buffer overflow existed in the iSCSI target implementation of the Linux kernel. A remote attacker could use this to cause a denial of service (system crash). (CVE-2018-14633)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04 ESM
linux-image-3.2.0-136-generic - 3.2.0-136.182
linux-image-3.2.0-136-generic-pae - 3.2.0-136.182
linux-image-3.2.0-136-highbank - 3.2.0-136.182
linux-image-3.2.0-136-omap - 3.2.0-136.182
linux-image-3.2.0-136-powerpc-smp - 3.2.0-136.182
linux-image-3.2.0-136-powerpc64-smp - 3.2.0-136.182
linux-image-3.2.0-136-virtual - 3.2.0-136.182
linux-image-generic -
linux-image-generic-pae -
linux-image-highbank -
linux-image-omap -
linux-image-powerpc -
linux-image-powerpc-smp -
linux-image-powerpc64-smp -

To update your system, please follow these instructions:

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.