========================================================================== Ubuntu Security Notice USN-7685-1 August 05, 2025
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp,
linux-gcp-4.15, linux-hwe, linux-kvm vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
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 protocol;
- USB sound devices;
(CVE-2024-53239, CVE-2023-52975, CVE-2024-38541, CVE-2023-52885,
CVE-2024-49883, CVE-2025-37797, CVE-2023-52757, CVE-2024-56748,
CVE-2024-49950, CVE-2024-50073)
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
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