==========================================================================
Ubuntu Security Notice USN-8186-1
April 17, 2026

linux-intel-iot-realtime, linux-realtime vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-intel-iot-realtime: Linux kernel for Intel IoT Real-time platforms
- linux-realtime: Linux kernel for Real-time 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;
  - Block layer subsystem;
  - Drivers core;
  - Bluetooth drivers;
  - DMA engine subsystem;
  - GPU drivers;
  - HID subsystem;
  - Intel Trace Hub HW tracing drivers;
  - IIO ADC drivers;
  - IRQ chip drivers;
  - Modular ISDN driver;
  - LED subsystem;
  - UACCE accelerator framework;
  - Ethernet bonding driver;
  - Network drivers;
  - STMicroelectronics network drivers;
  - Ethernet team driver;
  - NVME drivers;
  - PHY drivers;
  - SLIMbus drivers;
  - W1 Dallas's 1-wire bus driver;
  - Xen hypervisor drivers;
  - BTRFS file system;
  - Ext4 file system;
  - Network file system (NFS) client;
  - Network file system (NFS) server daemon;
  - NTFS3 file system;
  - SMB network file system;
  - NFC subsystem;
  - BPF subsystem;
  - IRQ subsystem;
  - Memory management;
  - Bluetooth subsystem;
  - CAN network layer;
  - Networking core;
  - IPv4 networking;
  - IPv6 networking;
  - L2TP protocol;
  - NET/ROM layer;
  - Network traffic control;
  - SCTP protocol;
  - TLS protocol;
  - XFRM subsystem;
  - Creative Sound Blaster X-Fi driver;
  - USB sound devices;
(CVE-2023-53421, CVE-2023-53520, CVE-2023-53662, CVE-2023-54207,
CVE-2025-38057, CVE-2025-38125, CVE-2025-38232, CVE-2025-38408,
CVE-2025-38591, CVE-2025-40149, CVE-2025-40164, CVE-2025-68211,
CVE-2025-68340, CVE-2025-68365, CVE-2025-68725, CVE-2025-68817,
CVE-2025-71080, CVE-2025-71162, CVE-2025-71163, CVE-2025-71185,
CVE-2025-71186, CVE-2025-71188, CVE-2025-71190, CVE-2025-71191,
CVE-2025-71194, CVE-2025-71196, CVE-2025-71197, CVE-2025-71199,
CVE-2026-22997, CVE-2026-22998, CVE-2026-22999, CVE-2026-23001,
CVE-2026-23003, CVE-2026-23011, CVE-2026-23026, CVE-2026-23033,
CVE-2026-23037, CVE-2026-23038, CVE-2026-23049, CVE-2026-23056,
CVE-2026-23058, CVE-2026-23061, CVE-2026-23063, CVE-2026-23064,
CVE-2026-23071, CVE-2026-23073, CVE-2026-23075, CVE-2026-23076,
CVE-2026-23078, CVE-2026-23080, CVE-2026-23083, CVE-2026-23084,
CVE-2026-23085, CVE-2026-23087, CVE-2026-23089, CVE-2026-23090,
CVE-2026-23091, CVE-2026-23093, CVE-2026-23095, CVE-2026-23096,
CVE-2026-23097, CVE-2026-23098, CVE-2026-23099, CVE-2026-23101,
CVE-2026-23103, CVE-2026-23105, CVE-2026-23108, CVE-2026-23119,
CVE-2026-23120, CVE-2026-23121, CVE-2026-23124, CVE-2026-23125,
CVE-2026-23128, CVE-2026-23133, CVE-2026-23145, CVE-2026-23146,
CVE-2026-23150, CVE-2026-23164, CVE-2026-23167, CVE-2026-23170,
CVE-2026-23209)

Update instructions:

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

Ubuntu 22.04 LTS
  linux-image-5.15.0-1097-intel-iot-realtime  5.15.0-1097.99
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1104-realtime  5.15.0-1104.113
                                  Available with Ubuntu Pro
  linux-image-intel-iot-realtime  5.15.0.1097.101
                                  Available with Ubuntu Pro
  linux-image-intel-iot-realtime-5.15  5.15.0.1097.101
                                  Available with Ubuntu Pro
  linux-image-realtime            5.15.0.1104.108
                                  Available with Ubuntu Pro
  linux-image-realtime-5.15       5.15.0.1104.108
                                  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-8186-1
  CVE-2023-53421, CVE-2023-53520, CVE-2023-53662, CVE-2023-54207,
  CVE-2025-38057, CVE-2025-38125, CVE-2025-38232, CVE-2025-38408,
  CVE-2025-38591, CVE-2025-40149, CVE-2025-40164, CVE-2025-68211,
  CVE-2025-68340, CVE-2025-68365, CVE-2025-68725, CVE-2025-68817,
  CVE-2025-71080, CVE-2025-71162, CVE-2025-71163, CVE-2025-71185,
  CVE-2025-71186, CVE-2025-71188, CVE-2025-71190, CVE-2025-71191,
  CVE-2025-71194, CVE-2025-71196, CVE-2025-71197, CVE-2025-71199,
  CVE-2026-22997, CVE-2026-22998, CVE-2026-22999, CVE-2026-23001,
  CVE-2026-23003, CVE-2026-23011, CVE-2026-23026, CVE-2026-23033,
  CVE-2026-23037, CVE-2026-23038, CVE-2026-23049, CVE-2026-23056,
  CVE-2026-23058, CVE-2026-23061, CVE-2026-23063, CVE-2026-23064,
  CVE-2026-23071, CVE-2026-23073, CVE-2026-23075, CVE-2026-23076,
  CVE-2026-23078, CVE-2026-23080, CVE-2026-23083, CVE-2026-23084,
  CVE-2026-23085, CVE-2026-23087, CVE-2026-23089, CVE-2026-23090,
  CVE-2026-23091, CVE-2026-23093, CVE-2026-23095, CVE-2026-23096,
  CVE-2026-23097, CVE-2026-23098, CVE-2026-23099, CVE-2026-23101,
  CVE-2026-23103, CVE-2026-23105, CVE-2026-23108, CVE-2026-23119,
  CVE-2026-23120, CVE-2026-23121, CVE-2026-23124, CVE-2026-23125,
  CVE-2026-23128, CVE-2026-23133, CVE-2026-23145, CVE-2026-23146,
  CVE-2026-23150, CVE-2026-23164, CVE-2026-23167, CVE-2026-23170,
  CVE-2026-23209

Package Information: