[USN-7701-3] Linux kernel (IoT) vulnerabilities

[Giampaolo Fresi Roglia]

==========================================================================
Ubuntu Security Notice USN-7701-3
August 21, 2025

linux-iot vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-iot: Linux kernel for IoT platforms

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:
  - Device tree and open firmware driver;
  - SCSI subsystem;
  - TTY drivers;
  - SMB network file system;
  - Bluetooth subsystem;
  - Network traffic control;
(CVE-2023-52975, CVE-2024-38541, CVE-2025-37797, CVE-2024-49950,
CVE-2024-50073, CVE-2023-52757, CVE-2025-38083)

Update instructions:

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

Ubuntu 20.04 LTS
  linux-image-5.4.0-1053-iot      5.4.0-1053.56
                                  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-7701-3
  https://ubuntu.com/security/notices/USN-7701-2
  https://ubuntu.com/security/notices/USN-7701-1
  CVE-2023-52757, CVE-2023-52975, CVE-2024-38541, CVE-2024-49950,
  CVE-2024-50073, CVE-2025-37797, CVE-2025-38083

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