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Ubuntu 16.04 LTS Linux Kernel Important Security Update USN-7987-1

ubuntu
Calendar Grey January 29, 2026
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-7987-1 addresses multiple important issues in the Linux kernel across several releases.
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-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:

- InfiniBand drivers;

- Media drivers;

- File systems infrastructure;

- Timer subsystem;

- Packet sockets;

- Network traffic control;

(CVE-2021-47485, CVE-2024-49959, CVE-2024-50195, CVE-2024-53164,

CVE-2024-56606, CVE-2025-39993)

Topics%20covered

Topics Covered

security advisory remote access Ubuntu important kernel linux

Update Instructions

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

Ubuntu 16.04 LTS
   linux-image-4.4.0-1152-kvm      4.4.0-1152.163
                                   Available with Ubuntu Pro
   linux-image-4.4.0-1189-aws      4.4.0-1189.204
                                   Available with Ubuntu Pro
   linux-image-4.4.0-277-generic   4.4.0-277.311
                                   Available with Ubuntu Pro
   linux-image-4.4.0-277-lowlatency  4.4.0-277.311
                                   Available with Ubuntu Pro
   linux-image-aws                 4.4.0.1189.193
                                   Available with Ubuntu Pro
   linux-image-generic             4.4.0.277.283
                                   Available with Ubuntu Pro
   linux-image-generic-lts-xenial  4.4.0.277.283
                                   Available with Ubuntu Pro
   linux-image-kvm                 4.4.0.1152.149
                                   Available with Ubuntu Pro
   linux-image-lowlatency          4.4.0.277.283
                                   Available with Ubuntu Pro
   linux-image-lowlatency-lts-xenial  4.4.0.277.283
                                   Available with Ubuntu Pro
   linux-image-virtual             4.4.0.277.283
                                   Available with Ubuntu Pro
   linux-image-virtual-lts-xenial  4.4.0.277.283
                                   Available with Ubuntu Pro

Ubuntu 14.04 LTS
   linux-image-4.4.0-1151-aws      4.4.0-1151.157
                                   Available with Ubuntu Pro
   linux-image-4.4.0-277-generic   4.4.0-277.311~14.04.1
                                   Available with Ubuntu Pro
   linux-image-4.4.0-277-lowlatency  4.4.0-277.311~14.04.1
                                   Available with Ubuntu Pro
   linux-image-aws                 4.4.0.1151.148
                                   Available with Ubuntu Pro
   linux-image-generic-lts-xenial  4.4.0.277.311~14.04.1
                                   Available with Ubuntu Pro
   linux-image-lowlatency-lts-xenial  4.4.0.277.311~14.04.1
                                   Available with Ubuntu Pro
   linux-image-virtual-lts-xenial  4.4.0.277.311~14.04.1
                                   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-7987-1

CVE-2021-47485, CVE-2024-49959, CVE-2024-50195, CVE-2024-53164,

CVE-2024-56606, CVE-2025-39993

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7987-1

Topics%20covered

Topics Covered

security advisory remote access Ubuntu important kernel linux

Package Information

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