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Ubuntu 16.04 ESM USN-5884-1 Critical: Linux-AWS Kernel Issues

ubuntu
Calendar Grey February 23, 2023
Dist Ubuntu Esm H88
Ubuntu 16.04 ESM patch resolves several kernel vulnerabilities. Significant security flaws risk data exposure and lead to system instability.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

Details:

Kirill Tkhai discovered that the XFS file system implementation in the

Linux kernel did not calculate size correctly when pre-allocating space in

some situations. A local attacker could use this to expose sensitive

information. (CVE-2021-4155)

Lee Jones discovered that a use-after-free vulnerability existed in the

Bluetooth implementation in the Linux kernel. A local attacker could use

this to cause a denial of service (system crash) or possibly execute

arbitrary code. (CVE-2022-20566)

Duoming Zhou discovered that a race condition existed in the SLIP driver in

the Linux kernel, leading to a null pointer dereference vulnerability. An

attacker could use this to cause a denial of service (system crash).

(CVE-2022-41858)

Tamás Koczka discovered that the Bluetooth L2CAP implementation in the

Linux kernel did...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical information exposure kernel issue ubuntu linux-aws

Update Instructions

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

Ubuntu 16.04 ESM:
   linux-image-4.4.0-1154-aws      4.4.0-1154.169
   linux-image-aws                 4.4.0.1154.158

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-5884-1

CVE-2021-4155, CVE-2022-20566, CVE-2022-41858, CVE-2022-42895,

CVE-2023-0045, CVE-2023-23559

Severity
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Critical

February 23, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical information exposure kernel issue ubuntu linux-aws

Package Information

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