========================================================================== Ubuntu Security Notice USN-8145-5 April 15, 2026
linux-azure, linux-azure-4.15 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems
- linux-azure: Linux kernel for Microsoft Azure Cloud 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-4.15.0-1199-azure 4.15.0-1199.214
Available with Ubuntu Pro
linux-image-azure-4.15 4.15.0.1199.167
Available with Ubuntu Pro
linux-image-azure-lts-18.04 4.15.0.1199.167
Available with Ubuntu Pro
Ubuntu 14.04 LTS
linux-image-4.15.0-1199-azure 4.15.0-1199.214~14.04.1
Available with Ubuntu Pro
linux-image-azure 4.15.0.1199.214~14.04.1
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-8145-5
https://ubuntu.com/security/notices/USN-8145-4
https://ubuntu.com/security/notices/USN-8145-3
https://ubuntu.com/security/notices/USN-8145-2
https://ubuntu.com/security/notices/USN-8145-1
CVE-2024-46777, CVE-2025-21735, CVE-2025-37849, CVE-2026-23060,
CVE-2026-23074
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