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Ubuntu 18.04 LTS: USN-7685-1 Linux Kernel Critical Security Issues

ubuntu
Calendar Grey August 5, 2025
Dist Ubuntu Esm H88
Various vulnerabilities tackled in Ubuntu's Linux kernel advisory. Immediate measures recommended for impacted machines.
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-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:

Several security issues were discovered in the Linux kernel.

An attacker could possibly use these to compromise the system.

This update corrects flaws in the following subsystems:

- Device tree and open firmware driver;

- SCSI subsystem;

- TTY drivers;

- Ext4 file system;

- SMB network file system;

- Bluetooth subsystem;

- Network traffic control;

- Sun RPC proto...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel linux system compromise

Update Instructions

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

Ubuntu 18.04 LTS
  linux-image-4.15.0-1166-kvm     4.15.0-1166.171
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1176-gcp     4.15.0-1176.193
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1183-aws     4.15.0-1183.196
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1191-azure   4.15.0-1191.206
                                  Available with Ubuntu Pro
  linux-image-4.15.0-240-generic  4.15.0-240.252
                                  Available with Ubuntu Pro
  linux-image-4.15.0-240-lowlatency  4.15.0-240.252
                                  Available with Ubuntu Pro
  linux-image-aws-4.15            4.15.0.1183.181
                                  Available with Ubuntu Pro
  linux-image-aws-lts-18.04       4.15.0.1183.181
                                  Available with Ubuntu Pro
  linux-image-azure-4.15          4.15.0.1191.159
                                  Available with Ubuntu Pro
  linux-image-azure-lts-18.04     4.15.0.1191.159
                                  Available with Ubuntu Pro
  linux-image-gcp-4.15            4.15.0.1176.189
                                  Available with Ubuntu Pro
  linux-image-gcp-lts-18.04       4.15.0.1176.189
                                  Available with Ubuntu Pro
  linux-image-generic             4.15.0.240.224
                                  Available with Ubuntu Pro
  linux-image-kvm                 4.15.0.1166.157
                                  Available with Ubuntu Pro
  linux-image-lowlatency          4.15.0.240.224
                                  Available with Ubuntu Pro
  linux-image-virtual             4.15.0.240.224
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  linux-image-4.15.0-1176-gcp     4.15.0-1176.193~16.04.1
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1183-aws     4.15.0-1183.196~16.04.1
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1191-azure   4.15.0-1191.206~16.04.1
                                  Available with Ubuntu Pro
  linux-image-4.15.0-240-generic  4.15.0-240.252~16.04.1
                                  Available with Ubuntu Pro
  linux-image-4.15.0-240-lowlatency  4.15.0-240.252~16.04.1
                                  Available with Ubuntu Pro
  linux-image-aws-hwe             4.15.0.1183.196~16.04.1
                                  Available with Ubuntu Pro
  linux-image-azure               4.15.0.1191.206~16.04.1
                                  Available with Ubuntu Pro
  linux-image-gcp                 4.15.0.1176.193~16.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-hwe-16.04   4.15.0.240.252~16.04.1
                                  Available with Ubuntu Pro
  linux-image-gke                 4.15.0.1176.193~16.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-hwe-16.04  4.15.0.240.252~16.04.1
                                  Available with Ubuntu Pro
  linux-image-oem                 4.15.0.240.252~16.04.1
                                  Available with Ubuntu Pro
  linux-image-virtual-hwe-16.04   4.15.0.240.252~16.04.1
                                  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-7685-1

CVE-2023-52757, CVE-2023-52885, CVE-2023-52975, CVE-2024-38541,

CVE-2024-49883, CVE-2024-49950, CVE-2024-50073, CVE-2024-53239,

CVE-2024-56748, CVE-2025-37797

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7685-1

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel linux system compromise

Package Information

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