[USN-8145-1] Linux kernel vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-8145-1
April 02, 2026

linux, linux-aws, linux-aws-hwe, linux-kvm, linux-oracle 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-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

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:
- ARM64 architecture;
- Cryptographic API;
- UDF file system;
- NFC subsystem;
- Network traffic control;
(CVE-2024-46777, CVE-2025-21735, CVE-2025-37849, CVE-2026-23060,
CVE-2026-23074)

Update instructions:

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

Ubuntu 18.04 LTS
linux-image-4.15.0-1152-oracle 4.15.0-1152.163
Available with Ubuntu Pro
linux-image-4.15.0-1172-kvm 4.15.0-1172.177
Available with Ubuntu Pro
linux-image-4.15.0-1190-aws 4.15.0-1190.203
Available with Ubuntu Pro
linux-image-4.15.0-248-generic 4.15.0-248.260
Available with Ubuntu Pro
linux-image-4.15.0-248-lowlatency 4.15.0-248.260
Available with Ubuntu Pro
linux-image-aws-4.15 4.15.0.1190.188
Available with Ubuntu Pro
linux-image-aws-lts-18.04 4.15.0.1190.188
Available with Ubuntu Pro
linux-image-generic 4.15.0.248.232
Available with Ubuntu Pro
linux-image-kvm 4.15.0.1172.163
Available with Ubuntu Pro
linux-image-lowlatency 4.15.0.248.232
Available with Ubuntu Pro
linux-image-oracle-4.15 4.15.0.1152.157
Available with Ubuntu Pro
linux-image-oracle-lts-18.04 4.15.0.1152.157
Available with Ubuntu Pro
linux-image-virtual 4.15.0.248.232
Available with Ubuntu Pro

Ubuntu 16.04 LTS
linux-image-4.15.0-1190-aws 4.15.0-1190.203~16.04.1
Available with Ubuntu Pro
linux-image-aws-hwe 4.15.0.1190.203~16.04.1
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-8145-1
CVE-2024-46777, CVE-2025-21735, CVE-2025-37849, CVE-2026-23060,
CVE-2026-23074