==========================================================================
Ubuntu Security Notice USN-7595-2
June 24, 2025

linux-realtime vulnerabilities
==========================================================================

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

- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-realtime: Linux kernel for Real-time systems

Details:

It was discovered that the CIFS network file system implementation in the
Linux kernel did not properly verify the target namespace when handling
upcalls. An attacker could use this to expose sensitive information.
(CVE-2025-2312)

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:
  - GPIO subsystem;
  - GPU drivers;
  - InfiniBand drivers;
  - IRQ chip drivers;
  - Network drivers;
  - Mellanox network drivers;
  - i.MX PM domains;
  - SCSI subsystem;
  - USB Serial drivers;
  - AFS file system;
  - GFS2 file system;
  - File systems infrastructure;
  - File system notification infrastructure;
  - Overlay file system;
  - Proc file system;
  - SMB network file system;
  - Timer subsystem;
  - Kernel CPU control infrastructure;
  - Memory management;
  - Networking core;
  - DCCP (Datagram Congestion Control Protocol);
  - IPv6 networking;
  - IEEE 802.15.4 subsystem;
  - Open vSwitch;
  - Network traffic control;
  - VMware vSockets driver;
(CVE-2025-21943, CVE-2025-21672, CVE-2024-57952, CVE-2024-57949,
CVE-2025-21683, CVE-2025-21690, CVE-2025-21699, CVE-2025-21676,
CVE-2024-57924, CVE-2025-21694, CVE-2024-57948, CVE-2025-21675,
CVE-2024-57951, CVE-2025-21692, CVE-2025-21684, CVE-2025-21668,
CVE-2025-21665, CVE-2025-21667, CVE-2025-21670, CVE-2025-21674,
CVE-2025-21697, CVE-2024-53124, CVE-2025-21666, CVE-2025-21682,
CVE-2025-21680, CVE-2025-21681, CVE-2025-21691, CVE-2025-21669,
CVE-2025-21673, CVE-2024-50157, CVE-2025-21689, CVE-2025-21678)

Update instructions:

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

Ubuntu 24.04 LTS
  linux-image-6.8.1-1023-realtime  6.8.1-1023.24
                                  Available with Ubuntu Pro
  linux-image-realtime            6.8.1-1023.24
                                  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-7595-2
  https://ubuntu.com/security/notices/USN-7595-1
  CVE-2024-50157, CVE-2024-53124, CVE-2024-57924, CVE-2024-57948,
  CVE-2024-57949, CVE-2024-57951, CVE-2024-57952, CVE-2025-21665,
  CVE-2025-21666, CVE-2025-21667, CVE-2025-21668, CVE-2025-21669,
  CVE-2025-21670, CVE-2025-21672, CVE-2025-21673, CVE-2025-21674,
  CVE-2025-21675, CVE-2025-21676, CVE-2025-21678, CVE-2025-21680,
  CVE-2025-21681, CVE-2025-21682, CVE-2025-21683, CVE-2025-21684,
  CVE-2025-21689, CVE-2025-21690, CVE-2025-21691, CVE-2025-21692,
  CVE-2025-21694, CVE-2025-21697, CVE-2025-21699, CVE-2025-21943,
  CVE-2025-2312

Package Information:
  https://launchpad.net/ubuntu/+source/linux-realtime/6.8.1-1023.24