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Ubuntu 16.04 LTS Advisory USN-6865-1 Critical: Kernel Denial of Service

ubuntu
Calendar Grey July 3, 2024
Dist Ubuntu Esm H88
Multiple vulnerabilities resolved in Ubuntu kernel patch 6865-1. Keep your systems current to avert 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:

It was discovered that the ext4 file system implementation in the Linux

kernel did not properly validate data state on write operations. An

attacker could use this to construct a malicious ext4 file system image

that, when mounted, could cause a denial of service (system crash).

(CVE-2021-33631)

It was discovered that the ATA over Ethernet (AoE) driver in the Linux

kernel contained a race condition, leading to a use-after-free

vulnerability. An attacker could use this to cause a denial of service or

possibly execute arbitrary code. (CVE-2023-6270)

Sander Wiebing, Alvise de Faveri Tron, Herbert Bos, and Cristiano Giuffrida

discovered that the Linux kernel mitigat...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update code execution ubuntu system crash ext4 filesystem

Update Instructions

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

Ubuntu 16.04 LTS
   linux-image-4.4.0-1134-kvm      4.4.0-1134.144
                                   Available with Ubuntu Pro
   linux-image-4.4.0-1171-aws      4.4.0-1171.186
                                   Available with Ubuntu Pro
   linux-image-4.4.0-256-generic   4.4.0-256.290
                                   Available with Ubuntu Pro
   linux-image-4.4.0-256-lowlatency  4.4.0-256.290
                                   Available with Ubuntu Pro
   linux-image-aws                 4.4.0.1171.175
                                   Available with Ubuntu Pro
   linux-image-generic             4.4.0.256.262
                                   Available with Ubuntu Pro
   linux-image-generic-lts-xenial  4.4.0.256.262
                                   Available with Ubuntu Pro
   linux-image-kvm                 4.4.0.1134.131
                                   Available with Ubuntu Pro
   linux-image-lowlatency          4.4.0.256.262
                                   Available with Ubuntu Pro
   linux-image-lowlatency-lts-xenial  4.4.0.256.262
                                   Available with Ubuntu Pro
   linux-image-virtual             4.4.0.256.262
                                   Available with Ubuntu Pro
   linux-image-virtual-lts-xenial  4.4.0.256.262
                                   Available with Ubuntu Pro

Ubuntu 14.04 LTS
   linux-image-4.4.0-1133-aws      4.4.0-1133.139
                                   Available with Ubuntu Pro
   linux-image-4.4.0-256-generic   4.4.0-256.290~14.04.1
                                   Available with Ubuntu Pro
   linux-image-4.4.0-256-lowlatency  4.4.0-256.290~14.04.1
                                   Available with Ubuntu Pro
   linux-image-aws                 4.4.0.1133.130
                                   Available with Ubuntu Pro
   linux-image-generic-lts-xenial  4.4.0.256.290~14.04.1
                                   Available with Ubuntu Pro
   linux-image-lowlatency-lts-xenial  4.4.0.256.290~14.04.1
                                   Available with Ubuntu Pro
   linux-image-virtual-lts-xenial  4.4.0.256.290~14.04.1
                                   Available with Ubuntu Pro

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-6865-1

CVE-2021-33631, CVE-2023-52615, CVE-2023-6270, CVE-2024-2201,

CVE-2024-23307, CVE-2024-24861, CVE-2024-26642, CVE-2024-26720,

CVE-2024-26898

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6865-1

Topics%20covered

Topics Covered

security advisory denial of service kernel update code execution ubuntu system crash ext4 filesystem

Package Information

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