Ubuntu 16.04 LTS: USN-4904-1 Critical Denial Of Service Notice

ubuntu

April 13, 2021

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-kvm: Linux kernel for cloud environments

- linux-raspi2: Linux kernel for Raspberry Pi (V8) systems

- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

Ben Harris discovered that the Linux kernel would strip extended privilege

attributes of files when performing a failed unprivileged system call. A

local attacker could use this to cause a denial of service. (CVE-2015-1350)

Andrey Konovalov discovered that the video4linux driver for Hauppauge HD

PVR USB devices in the Linux kernel did not properly handle some error

conditions. A physically proximate attacker could use this to cause a

denial of service (system crash) or possibly execute arbitrary code.

(CVE-2017-16644)

It was discovered t...

Read the Full Advisory

Topics Covered

security advisory denial of service critical Ubuntu vulnerability kernel system update Linux kernel

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1091-kvm      4.4.0-1091.100
  linux-image-4.4.0-1126-aws      4.4.0-1126.140
  linux-image-4.4.0-1150-raspi2   4.4.0-1150.161
  linux-image-4.4.0-1154-snapdragon  4.4.0-1154.164
  linux-image-4.4.0-208-generic   4.4.0-208.240
  linux-image-4.4.0-208-generic-lpae  4.4.0-208.240
  linux-image-4.4.0-208-lowlatency  4.4.0-208.240
  linux-image-4.4.0-208-powerpc-e500mc  4.4.0-208.240
  linux-image-4.4.0-208-powerpc-smp  4.4.0-208.240
  linux-image-4.4.0-208-powerpc64-emb  4.4.0-208.240
  linux-image-4.4.0-208-powerpc64-smp  4.4.0-208.240
  linux-image-aws                 4.4.0.1126.131
  linux-image-generic             4.4.0.208.214
  linux-image-generic-lpae        4.4.0.208.214
  linux-image-kvm                 4.4.0.1091.89
  linux-image-lowlatency          4.4.0.208.214
  linux-image-powerpc-e500mc      4.4.0.208.214
  linux-image-powerpc-smp         4.4.0.208.214
  linux-image-powerpc64-emb       4.4.0.208.214
  linux-image-powerpc64-smp       4.4.0.208.214
  linux-image-raspi2              4.4.0.1150.150
  linux-image-snapdragon          4.4.0.1154.146
  linux-image-virtual             4.4.0.208.214

Ubuntu 14.04 ESM:
  linux-image-4.4.0-1090-aws      4.4.0-1090.94
  linux-image-4.4.0-208-generic   4.4.0-208.240~14.04.1
  linux-image-4.4.0-208-generic-lpae  4.4.0-208.240~14.04.1
  linux-image-4.4.0-208-lowlatency  4.4.0-208.240~14.04.1
  linux-image-aws                 4.4.0.1090.87
  linux-image-generic-lpae-lts-xenial  4.4.0.208.181
  linux-image-generic-lts-xenial  4.4.0.208.181
  linux-image-lowlatency-lts-xenial  4.4.0.208.181
  linux-image-virtual-lts-xenial  4.4.0.208.181

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.