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Ubuntu 16.04 LTS - USN-7607-1 critical: Linux kernel denial of service

ubuntu
Calendar Grey July 2, 2025
Dist Ubuntu Esm H88
Weaknesses within the Linux kernel of Ubuntu may result in Denial of Service attacks and enable unauthorized code execution, prompting immediate updates.
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-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

It was discovered that a use-after-free vulnerability existed in the

Bluetooth stack in the Linux kernel. A local attacker could use this to

cause a denial of service (system crash) or possibly execute arbitrary

code. (CVE-2022-3640)

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:

- SCSI subsystem;

- Network file system (NFS) client;

- NILFS2 file system;

- File systems infrastructure;

- Memory management;

- Bluetooth subsystem;

- Network traffic control;

- USB sound devices;

(CVE-2024-50116, CVE-2021-47576, CVE-2024-53197, CVE-2024-46787,

CVE-2025-37798...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu system crash Linux kernel

Update Instructions

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

Ubuntu 16.04 LTS
   linux-image-4.4.0-1183-aws      4.4.0-1183.198
                                   Available with Ubuntu Pro
   linux-image-4.4.0-270-generic   4.4.0-270.304
                                   Available with Ubuntu Pro
   linux-image-4.4.0-270-lowlatency  4.4.0-270.304
                                   Available with Ubuntu Pro
   linux-image-aws                 4.4.0.1183.187
                                   Available with Ubuntu Pro
   linux-image-generic             4.4.0.270.276
                                   Available with Ubuntu Pro
   linux-image-generic-lts-xenial  4.4.0.270.276
                                   Available with Ubuntu Pro
   linux-image-lowlatency          4.4.0.270.276
                                   Available with Ubuntu Pro
   linux-image-lowlatency-lts-xenial  4.4.0.270.276
                                   Available with Ubuntu Pro
   linux-image-virtual             4.4.0.270.276
                                   Available with Ubuntu Pro
   linux-image-virtual-lts-xenial  4.4.0.270.276
                                   Available with Ubuntu Pro

Ubuntu 14.04 LTS
   linux-image-4.4.0-1145-aws      4.4.0-1145.151
                                   Available with Ubuntu Pro
   linux-image-4.4.0-270-generic   4.4.0-270.304~14.04.1
                                   Available with Ubuntu Pro
   linux-image-4.4.0-270-lowlatency  4.4.0-270.304~14.04.1
                                   Available with Ubuntu Pro
   linux-image-aws                 4.4.0.1145.142
                                   Available with Ubuntu Pro
   linux-image-generic-lts-xenial  4.4.0.270.304~14.04.1
                                   Available with Ubuntu Pro
   linux-image-lowlatency-lts-xenial  4.4.0.270.304~14.04.1
                                   Available with Ubuntu Pro
   linux-image-virtual-lts-xenial  4.4.0.270.304~14.04.1
                                   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-7607-1

CVE-2021-47260, CVE-2021-47576, CVE-2022-3640, CVE-2022-49909,

CVE-2024-46787, CVE-2024-49958, CVE-2024-50116, CVE-2024-53197,

CVE-2025-37798, CVE-2025-37932

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7607-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu system crash Linux kernel

Package Information

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