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Ubuntu 16.04 LTS USN-6388-1 Critical Kernel Exploits Fixed

ubuntu
Calendar Grey September 19, 2023
Dist Ubuntu Esm H88
A series of security updates issued for the Linux kernel within Ubuntu, bolstering protection measures against potential threats.
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-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

Daniel Moghimi discovered that some Intel(R) Processors did not properly

clear microarchitectural state after speculative execution of various

instructions. A local unprivileged user could use this to obtain to

sensitive information. (CVE-2022-40982)

Yang Lan discovered that the GFS2 file system implementation in the Linux

kernel could attempt to dereference a null pointer in some situations. An

attacker could use this to construct a malicious GFS2 image that, when

mounted and operated on, could cause a denial of service (system crash).

(CVE-2023-3212)

It was discovered that the NET/ROM protocol implementation in the Linux

kernel contained a race condition in so...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel system update exploits

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-4.4.0-1124-kvm      4.4.0-1124.134
   linux-image-4.4.0-1161-aws      4.4.0-1161.176
   linux-image-4.4.0-245-generic   4.4.0-245.279
   linux-image-4.4.0-245-lowlatency  4.4.0-245.279
   linux-image-aws                 4.4.0.1161.165
   linux-image-generic             4.4.0.245.251
   linux-image-generic-lts-xenial  4.4.0.245.251
   linux-image-kvm                 4.4.0.1124.121
   linux-image-lowlatency          4.4.0.245.251
   linux-image-lowlatency-lts-xenial  4.4.0.245.251
   linux-image-virtual             4.4.0.245.251
   linux-image-virtual-lts-xenial  4.4.0.245.251

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   linux-image-4.4.0-1123-aws      4.4.0-1123.129
   linux-image-4.4.0-245-generic   4.4.0-245.279~14.04.1
   linux-image-4.4.0-245-lowlatency  4.4.0-245.279~14.04.1
   linux-image-aws                 4.4.0.1123.120
   linux-image-generic-lts-xenial  4.4.0.245.213
   linux-image-lowlatency-lts-xenial  4.4.0.245.213
   linux-image-virtual-lts-xenial  4.4.0.245.213

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-6388-1

CVE-2022-40982, CVE-2023-3212, CVE-2023-32269, CVE-2023-3863,

CVE-2023-40283, CVE-2023-4128, CVE-2023-4385, CVE-2023-4387,

CVE-2023-4459

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6388-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel system update exploits

Package Information

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