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Ubuntu 14.04 LTS: USN-2910-2 Critical Kernel Regression Issue

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Calendar Grey February 27, 2016
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Solution for Ubuntu 14.04 LTS issue resulting from USN-2910-1 impacting visuals on VMWare. Apply the update immediately!
USN-2910-1 introduced a regression in the Ubuntu 15.04 Linux kernel backported to Ubuntu 14.04 LTS.

Summary

USN-2910-1 introduced a regression in the Ubuntu 15.04 Linux kernel

backported to Ubuntu 14.04 LTS.

Software Description:

- linux-lts-vivid: Linux hardware enablement kernel from Vivid for Trusty

Details:

USN-2910-1 fixed vulnerabilities in the Ubuntu 15.04 Linux kernel

backported to Ubuntu 14.04 LTS. An incorrect locking fix caused a

regression that broke graphics displays for Ubuntu 14.04 LTS guests

running the Ubuntu 15.04 backport kernel within VMWare virtual

machines. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,

incorrectly propagated file attributes, including setuid. A local

unprivileged attacker could use this to gain privileges. (CVE-2016-1576)

halfdog discovered that OverlayFS in the Linux kernel incorrectly

propagated security sensitive extended attributes, such as POSIX ACLs. A

local unprivileged attacker could u...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service update instructions ubuntu linux kernel regression fix graphics issue

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.19.0-51-generic   3.19.0-51.58~14.04.1
  linux-image-3.19.0-51-generic-lpae  3.19.0-51.58~14.04.1
  linux-image-3.19.0-51-lowlatency  3.19.0-51.58~14.04.1
  linux-image-3.19.0-51-powerpc-e500mc  3.19.0-51.58~14.04.1
  linux-image-3.19.0-51-powerpc-smp  3.19.0-51.58~14.04.1
  linux-image-3.19.0-51-powerpc64-emb  3.19.0-51.58~14.04.1
  linux-image-3.19.0-51-powerpc64-smp  3.19.0-51.58~14.04.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2910-2

https://ubuntu.com/security/notices/USN-2910-1

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1548587

Severity
critical
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Critical

February 27, 2016

Topics%20covered

Topics Covered

security advisory denial of service update instructions ubuntu linux kernel regression fix graphics issue

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-51.58~14.04.1

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