Ubuntu alert USN-7835-2 (linux-realtime, linux-realtime-6.8)

From:
             
 
Rodrigo Figueiredo Zaiden <rodrigo.zaiden@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-7835-2] Linux kernel (Real-time) vulnerabilities
Date:
             
 
Wed, 22 Oct 2025 13:49:10 -0300
Message-ID:
             
 
<57ed1604-6e65-4391-bfc1-61937b09e39f@canonical.com>
==========================================================================
Ubuntu Security Notice USN-7835-2
October 22, 2025

linux-realtime, linux-realtime-6.8 vulnerabilities
==========================================================================

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

- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-realtime: Linux kernel for Real-time systems
- linux-realtime-6.8: 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;
   - PowerPC architecture;
   - x86 architecture;
   - ACPI drivers;
   - Ublk userspace block driver;
   - Clock framework and drivers;
   - GPU drivers;
   - IIO subsystem;
   - InfiniBand drivers;
   - Media drivers;
   - MemoryStick subsystem;
   - Network drivers;
   - NTB driver;
   - PCI subsystem;
   - Remote Processor subsystem;
   - Thermal drivers;
   - Virtio Host (VHOST) subsystem;
   - 9P distributed file system;
   - File systems infrastructure;
   - JFS file system;
   - Network file system (NFS) server daemon;
   - NTFS3 file system;
   - SMB network file system;
   - Memory management;
   - RDMA verbs API;
   - Kernel fork() syscall;
   - Tracing infrastructure;
   - Watch queue notification mechanism;
   - Asynchronous Transfer Mode (ATM) subsystem;
   - Networking core;
   - IPv4 networking;
   - IPv6 networking;
   - Netfilter;
   - Network traffic control;
   - SCTP protocol;
   - TLS protocol;
   - SoC Audio for Freescale CPUs drivers;
(CVE-2025-39728, CVE-2025-23136, CVE-2025-22062, CVE-2025-22035,
CVE-2025-22020, CVE-2025-22083, CVE-2025-22071, CVE-2025-22060,
CVE-2025-22073, CVE-2025-22044, CVE-2025-22063, CVE-2025-22079,
CVE-2025-22057, CVE-2025-22095, CVE-2025-39735, CVE-2025-39682,
CVE-2025-22058, CVE-2025-22021, CVE-2025-22018, CVE-2025-22056,
CVE-2025-22054, CVE-2025-22080, CVE-2025-22039, CVE-2025-22019,
CVE-2025-22038, CVE-2025-22028, CVE-2023-53034, CVE-2024-58092,
CVE-2025-38637, CVE-2025-22089, CVE-2025-40114, CVE-2025-22068,
CVE-2025-37937, CVE-2025-22070, CVE-2025-22072, CVE-2025-22086,
CVE-2025-22050, CVE-2025-22040, CVE-2025-22065, CVE-2025-38575,
CVE-2025-22064, CVE-2025-22033, CVE-2025-22041, CVE-2025-22090,
CVE-2025-22036, CVE-2025-23138, CVE-2025-22047, CVE-2025-38240,
CVE-2025-22066, CVE-2025-22042, CVE-2025-38152, CVE-2025-22055,
CVE-2025-22081, CVE-2025-22045, CVE-2025-22053, CVE-2025-22075,
CVE-2025-22027, CVE-2025-22025, CVE-2025-22097)

Update instructions:

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

Ubuntu 24.04 LTS
   linux-image-6.8.1-1036-realtime  6.8.1-1036.37
                                   Available with Ubuntu Pro
   linux-image-realtime            6.8.1-1036.37
                                   Available with Ubuntu Pro
   linux-image-realtime-6.8.1      6.8.1-1036.37
                                   Available with Ubuntu Pro

Ubuntu 22.04 LTS
   linux-image-6.8.1-1036-realtime  6.8.1-1036.37~22.04.1
                                   Available with Ubuntu Pro
   linux-image-realtime-6.8.1      6.8.1-1036.37~22.04.1
                                   Available with Ubuntu Pro
   linux-image-realtime-hwe-22.04  6.8.1-1036.37~22.04.1
                                   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-7835-2
   https://ubuntu.com/security/notices/USN-7835-1
   CVE-2023-53034, CVE-2024-58092, CVE-2025-22018, CVE-2025-22019,
   CVE-2025-22020, CVE-2025-22021, CVE-2025-22025, CVE-2025-22027,
   CVE-2025-22028, CVE-2025-22033, CVE-2025-22035, CVE-2025-22036,
   CVE-2025-22038, CVE-2025-22039, CVE-2025-22040, CVE-2025-22041,
   CVE-2025-22042, CVE-2025-22044, CVE-2025-22045, CVE-2025-22047,
   CVE-2025-22050, CVE-2025-22053, CVE-2025-22054, CVE-2025-22055,
   CVE-2025-22056, CVE-2025-22057, CVE-2025-22058, CVE-2025-22060,
   CVE-2025-22062, CVE-2025-22063, CVE-2025-22064, CVE-2025-22065,
   CVE-2025-22066, CVE-2025-22068, CVE-2025-22070, CVE-2025-22071,
   CVE-2025-22072, CVE-2025-22073, CVE-2025-22075, CVE-2025-22079,
   CVE-2025-22080, CVE-2025-22081, CVE-2025-22083, CVE-2025-22086,
   CVE-2025-22089, CVE-2025-22090, CVE-2025-22095, CVE-2025-22097,
   CVE-2025-23136, CVE-2025-23138, CVE-2025-37937, CVE-2025-38152,
   CVE-2025-38240, CVE-2025-38575, CVE-2025-38637, CVE-2025-39682,
   CVE-2025-39728, CVE-2025-39735, CVE-2025-40114

Package Information:
   https://launchpad.net/ubuntu/+source/linux-realtime/6.8.1...
  
https://launchpad.net/ubuntu/+source/linux-realtime-6.8/6...



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