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Ubuntu 18.04 LTS: USN-7428-1 critical: Kernel Update for Access Flaws

ubuntu
Calendar Grey April 9, 2025
Dist Ubuntu Esm H88
The Ubuntu security announcement includes steps for a kernel upgrade designed to resolve various security flaws and enhance system integrity.
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:

Demi Marie Obenour and Simon Gaiser discovered that several Xen para-

virtualization device frontends did not properly restrict the access rights

of device backends. An attacker could possibly use a malicious Xen backend

to gain access to memory pages of a guest VM or cause a denial of service

in the gues...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update Ubuntu memory access cloud environment

Update Instructions

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

Ubuntu 18.04 LTS
   linux-image-4.15.0-1141-oracle  4.15.0-1141.152
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1162-kvm     4.15.0-1162.167
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1172-gcp     4.15.0-1172.189
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1179-aws     4.15.0-1179.192
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1187-azure   4.15.0-1187.202
                                   Available with Ubuntu Pro
   linux-image-4.15.0-236-generic  4.15.0-236.248
                                   Available with Ubuntu Pro
   linux-image-4.15.0-236-lowlatency  4.15.0-236.248
                                   Available with Ubuntu Pro
   linux-image-aws-lts-18.04       4.15.0.1179.177
                                   Available with Ubuntu Pro
   linux-image-azure-lts-18.04     4.15.0.1187.155
                                   Available with Ubuntu Pro
   linux-image-gcp-lts-18.04       4.15.0.1172.185
                                   Available with Ubuntu Pro
   linux-image-generic             4.15.0.236.220
                                   Available with Ubuntu Pro
   linux-image-kvm                 4.15.0.1162.153
                                   Available with Ubuntu Pro
   linux-image-lowlatency          4.15.0.236.220
                                   Available with Ubuntu Pro
   linux-image-oracle-lts-18.04    4.15.0.1141.146
                                   Available with Ubuntu Pro
   linux-image-virtual             4.15.0.236.220
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   linux-image-4.15.0-1141-oracle  4.15.0-1141.152~16.04.1
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1172-gcp     4.15.0-1172.189~16.04.1
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1179-aws     4.15.0-1179.192~16.04.1
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1187-azure   4.15.0-1187.202~16.04.1
                                   Available with Ubuntu Pro
   linux-image-4.15.0-236-generic  4.15.0-236.248~16.04.1
                                   Available with Ubuntu Pro
   linux-image-4.15.0-236-lowlatency  4.15.0-236.248~16.04.1
                                   Available with Ubuntu Pro
   linux-image-aws-hwe             4.15.0.1179.192~16.04.1
                                   Available with Ubuntu Pro
   linux-image-azure               4.15.0.1187.202~16.04.1
                                   Available with Ubuntu Pro
   linux-image-gcp                 4.15.0.1172.189~16.04.1
                                   Available with Ubuntu Pro
   linux-image-generic-hwe-16.04   4.15.0.236.248~16.04.1
                                   Available with Ubuntu Pro
   linux-image-gke                 4.15.0.1172.189~16.04.1
                                   Available with Ubuntu Pro
   linux-image-lowlatency-hwe-16.04  4.15.0.236.248~16.04.1
                                   Available with Ubuntu Pro
   linux-image-oem                 4.15.0.236.248~16.04.1
                                   Available with Ubuntu Pro
   linux-image-oracle              4.15.0.1141.152~16.04.1
                                   Available with Ubuntu Pro
   linux-image-virtual-hwe-16.04   4.15.0.236.248~16.04.1
                                   Available with Ubuntu Pro

Ubuntu 14.04 LTS
   linux-image-4.15.0-1187-azure   4.15.0-1187.202~14.04.1
                                   Available with Ubuntu Pro
   linux-image-azure               4.15.0.1187.202~14.04.1
                                   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-7428-1

CVE-2021-47101, CVE-2021-47119, CVE-2022-23041, CVE-2024-26863,

CVE-2024-35960, CVE-2024-35973, CVE-2024-46826, CVE-2024-49948,

CVE-2024-49952, CVE-2024-50167, CVE-2024-50265, CVE-2024-50302,

CVE-2024-53165, CVE-2024-53227, CVE-2024-56595, CVE-2024-56600,

CVE-2024-56615, CVE-2024-56658, CVE-2025-21700, CVE-2025-21702

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7428-1

Topics%20covered

Topics Covered

security advisory denial of service kernel update Ubuntu memory access cloud environment

Package Information

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