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Ubuntu 18.04 LTS USN-6647-1 Critical: Kernel Denial Of Service

ubuntu
Calendar Grey February 21, 2024
Dist Ubuntu Esm H88
A series of kernel updates has been issued in Ubuntu Security Notice USN-6647-1 to resolve significant vulnerabilities.
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-azure-4.15: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

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

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

It was discovered that a race condition existed in the ATM (Asynchronous

Transfer Mode) subsystem of the Linux kernel, leading to a use-after-free

vulnerability. A local attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2023-51780)

It was discov...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu critical issues local code execution

Update Instructions

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-4.15.0-1128-oracle  4.15.0-1128.139
   linux-image-4.15.0-1149-kvm     4.15.0-1149.154
   linux-image-4.15.0-1159-gcp     4.15.0-1159.176
   linux-image-4.15.0-1165-aws     4.15.0-1165.178
   linux-image-4.15.0-1174-azure   4.15.0-1174.189
   linux-image-4.15.0-222-generic  4.15.0-222.233
   linux-image-4.15.0-222-lowlatency  4.15.0-222.233
   linux-image-aws-lts-18.04       4.15.0.1165.163
   linux-image-azure-lts-18.04     4.15.0.1174.142
   linux-image-gcp-lts-18.04       4.15.0.1159.173
   linux-image-generic             4.15.0.222.206
   linux-image-kvm                 4.15.0.1149.140
   linux-image-lowlatency          4.15.0.222.206
   linux-image-oracle-lts-18.04    4.15.0.1128.133
   linux-image-virtual             4.15.0.222.206

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   linux-image-4.15.0-1128-oracle  4.15.0-1128.139~16.04.1
   linux-image-4.15.0-1159-gcp     4.15.0-1159.176~16.04.1
   linux-image-4.15.0-1165-aws     4.15.0-1165.178~16.04.1
   linux-image-4.15.0-1174-azure   4.15.0-1174.189~16.04.1
   linux-image-4.15.0-222-generic  4.15.0-222.233~16.04.1
   linux-image-4.15.0-222-lowlatency  4.15.0-222.233~16.04.1
   linux-image-aws-hwe             4.15.0.1165.148
   linux-image-azure               4.15.0.1174.158
   linux-image-gcp                 4.15.0.1159.149
   linux-image-generic-hwe-16.04   4.15.0.222.6
   linux-image-gke                 4.15.0.1159.149
   linux-image-lowlatency-hwe-16.04  4.15.0.222.6
   linux-image-oem                 4.15.0.222.6
   linux-image-oracle              4.15.0.1128.109
   linux-image-virtual-hwe-16.04   4.15.0.222.6

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-6647-1

CVE-2023-51780, CVE-2023-51782, CVE-2023-7192

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6647-1

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu critical issues local code execution

Package Information

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