Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 496
Alerts This Week
Warning Icon 1 496

Ubuntu 14.10 USN-2448-2 Moderate: Kernel TCP Throughput Issue

ubuntu
Calendar Grey December 19, 2014
Dist Ubuntu Esm H88
Addressed regression impacting TCP performance on Ubuntu 14.10 post USN-2448-1. Critical update to enhance kernel stability and optimize network throughput.
USN-2448-1 introduced a regression in the Linux kernel.

Summary

USN-2448-1 introduced a regression in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

USN-2448-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated

regression TCP Throughput drops to zero for several drivers after upgrading.

This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

An information leak in the Linux kernel was discovered that could leak the

high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine

(KVM) paravirt guests. A user in the guest OS could exploit this leak to

obtain information that could potentially be used to aid in attacking the

kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace

subsystem of the Linux kernel does not properly handle private syscall

numbers. A local user could exploit this flaw to cause a denial of service

(OOPS). (CVE-2014-7826)

A flaw in the handling of malforme...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory kernel update system stability ubuntu tcp throughput

Update Instructions

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

Ubuntu 14.10:
  linux-image-3.16.0-28-generic   3.16.0-28.38
  linux-image-3.16.0-28-generic-lpae  3.16.0-28.38
  linux-image-3.16.0-28-lowlatency  3.16.0-28.38
  linux-image-3.16.0-28-powerpc-e500mc  3.16.0-28.38
  linux-image-3.16.0-28-powerpc-smp  3.16.0-28.38
  linux-image-3.16.0-28-powerpc64-emb  3.16.0-28.38
  linux-image-3.16.0-28-powerpc64-smp  3.16.0-28.38

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

References

https://ubuntu.com/security/notices/USN-2448-1

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1390604

Severity
important
Lowest
Low
Medium
High
Critical

December 19, 2014

Topics%20covered

Topics Covered

security advisory kernel update system stability ubuntu tcp throughput

Package Information

https://launchpad.net/ubuntu/+source/linux/3.16.0-28.38

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.