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==========================================================================
Ubuntu Security Notice USN-7930-1
December 15, 2025
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 14.04 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-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
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:
- Cryptographic API;
- ACPI drivers;
- Hardware monitoring drivers;
- InfiniBand drivers;
- MTD block device drivers;
- Network drivers;
- DesignWare USB3 driver;
- Ceph distributed file system;
- Network file system (NFS) server daemon;
- NILFS2 file system;
- File systems infrastructure;
- Tracing infrastructure;
- Appletalk network protocol;
- IPv6 networking;
- Netfilter;
(CVE-2021-47146, CVE-2021-47269, CVE-2021-47385, CVE-2021-47634,
CVE-2022-49026, CVE-2024-49935, CVE-2024-50067, CVE-2024-50095,
CVE-2024-50179, CVE-2024-53112, CVE-2024-53217, CVE-2025-21715,
CVE-2025-21722, CVE-2025-21811, CVE-2025-21855, CVE-2025-38666,
CVE-2025-39964, CVE-2025-40018)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS
linux-image-4.4.0-1151-kvm 4.4.0-1151.162
Available with Ubuntu Pro
linux-image-4.4.0-1188-aws 4.4.0-1188.203
Available with Ubuntu Pro
linux-image-4.4.0-276-generic 4.4.0-276.310
Available with Ubuntu Pro
linux-image-4.4.0-276-lowlatency 4.4.0-276.310
Available with Ubuntu Pro
linux-image-aws 4.4.0.1188.192
Available with Ubuntu Pro
linux-image-generic 4.4.0.276.282
Available with Ubuntu Pro
linux-image-generic-lts-xenial 4.4.0.276.282
Available with Ubuntu Pro
linux-image-kvm 4.4.0.1151.148
Available with Ubuntu Pro
linux-image-lowlatency 4.4.0.276.282
Available with Ubuntu Pro
linux-image-lowlatency-lts-xenial 4.4.0.276.282
Available with Ubuntu Pro
linux-image-virtual 4.4.0.276.282
Available with Ubuntu Pro
linux-image-virtual-lts-xenial 4.4.0.276.282
Available with Ubuntu Pro
Ubuntu 14.04 LTS
linux-image-4.4.0-1150-aws 4.4.0-1150.156
Available with Ubuntu Pro
linux-image-4.4.0-276-generic 4.4.0-276.310~14.04.1
Available with Ubuntu Pro
linux-image-4.4.0-276-lowlatency 4.4.0-276.310~14.04.1
Available with Ubuntu Pro
linux-image-aws 4.4.0.1150.147
Available with Ubuntu Pro
linux-image-generic-lts-xenial 4.4.0.276.310~14.04.1
Available with Ubuntu Pro
linux-image-lowlatency-lts-xenial 4.4.0.276.310~14.04.1
Available with Ubuntu Pro
linux-image-virtual-lts-xenial 4.4.0.276.310~14.04.1
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-7930-1
CVE-2021-47146, CVE-2021-47269, CVE-2021-47385, CVE-2021-47634,
CVE-2022-49026, CVE-2024-49935, CVE-2024-50067, CVE-2024-50095,
CVE-2024-50179, CVE-2024-53112, CVE-2024-53217, CVE-2025-21715,
CVE-2025-21722, CVE-2025-21811, CVE-2025-21855, CVE-2025-38666,
CVE-2025-39964, CVE-2025-40018
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