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Ubuntu 16.04 LTS USN-6602-1 moderate: Linux kernel flaws addressed

ubuntu
Calendar Grey January 25, 2024
Dist Ubuntu Esm H88
The security flaws in Ubuntu's kernel have been addressed. It's essential to perform updates regularly to reduce the chances of sensitive information being compromised.
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-kvm: Linux kernel for cloud environments

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

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

Details:

Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii

Oleksenko discovered that some AMD processors could leak stale data from

division operations in certain situations. A local attacker could possibly

use this to expose sensitive information. (CVE-2023-20588)

It was discovered that a race condition existed in the Linux kernel when

performing operations with kernel objects, leading to an out-of-bounds

write. A local attacker could use this to cause a denial of service (system

crash) or execute arbitrary code. (CVE-2023-45863)

It was discovered that the CIFS network file system implementation in the

Linux kernel did not properly validate the ser...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel information exposure ubuntu

Update Instructions

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

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   linux-image-4.4.0-1128-kvm      4.4.0-1128.138
   linux-image-4.4.0-250-generic   4.4.0-250.284
   linux-image-4.4.0-250-lowlatency  4.4.0-250.284
   linux-image-generic             4.4.0.250.256
   linux-image-generic-lts-xenial  4.4.0.250.256
   linux-image-kvm                 4.4.0.1128.125
   linux-image-lowlatency          4.4.0.250.256
   linux-image-lowlatency-lts-xenial  4.4.0.250.256
   linux-image-virtual             4.4.0.250.256
   linux-image-virtual-lts-xenial  4.4.0.250.256

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   linux-image-4.4.0-1127-aws      4.4.0-1127.133
   linux-image-4.4.0-250-generic   4.4.0-250.284~14.04.1
   linux-image-4.4.0-250-lowlatency  4.4.0-250.284~14.04.1
   linux-image-aws                 4.4.0.1127.124
   linux-image-generic-lts-xenial  4.4.0.250.217
   linux-image-lowlatency-lts-xenial  4.4.0.250.217
   linux-image-virtual-lts-xenial  4.4.0.250.217

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.

References

https://ubuntu.com/security/notices/USN-6602-1

CVE-2023-20588, CVE-2023-45863, CVE-2023-6606, CVE-2023-6931,

CVE-2023-6932

Ubuntu Security Notice USN-6602-1

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel information exposure ubuntu

Package Information

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