1. Ubuntu Security Notices
  2. USN-7383-2

USN-7383-2: Linux kernel (Real-time) vulnerabilities

Publication date

27 March 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

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;
  • x86 architecture;
  • Block layer subsystem;
  • Drivers core;
  • Ublk userspace block driver;
  • Compressed RAM block device driver;
  • CPU frequency scaling framework;
  • DAX dirext access to differentiated memory framework;
  • GPU drivers;
  • HID subsystem;
  • I3C subsystem;
  • IIO subsystem;
  • InfiniBand drivers;
  • IOMMU subsystem;
  • IRQ chip drivers;
  • Network drivers;
  • NTB driver;
  • Virtio pmem driver;
  • Parport drivers;
  • Pin controllers subsystem;
  • SCSI subsystem;
  • SuperH / SH-Mobile drivers;
  • Direct Digital Synthesis drivers;
  • Thermal drivers;
  • TTY drivers;
  • UFS...

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;
  • x86 architecture;
  • Block layer subsystem;
  • Drivers core;
  • Ublk userspace block driver;
  • Compressed RAM block device driver;
  • CPU frequency scaling framework;
  • DAX dirext access to differentiated memory framework;
  • GPU drivers;
  • HID subsystem;
  • I3C subsystem;
  • IIO subsystem;
  • InfiniBand drivers;
  • IOMMU subsystem;
  • IRQ chip drivers;
  • Network drivers;
  • NTB driver;
  • Virtio pmem driver;
  • Parport drivers;
  • Pin controllers subsystem;
  • SCSI subsystem;
  • SuperH / SH-Mobile drivers;
  • Direct Digital Synthesis drivers;
  • Thermal drivers;
  • TTY drivers;
  • UFS subsystem;
  • USB Gadget drivers;
  • USB Host Controller drivers;
  • TI TPS6598x USB Power Delivery controller driver;
  • Framebuffer layer;
  • BTRFS file system;
  • Ext4 file system;
  • F2FS file system;
  • Network file system (NFS) client;
  • NILFS2 file system;
  • NTFS3 file system;
  • SMB network file system;
  • BPF subsystem;
  • Network file system (NFS) superblock;
  • Network traffic control;
  • Network sockets;
  • User-space API (UAPI);
  • io_uring subsystem;
  • Kernel thread helper (kthread);
  • RCU subsystem;
  • Timer subsystem;
  • Maple Tree data structure library;
  • Memory management;
  • Bluetooth subsystem;
  • Ethernet bridge;
  • Networking core;
  • IPv4 networking;
  • Multipath TCP;
  • Netfilter;
  • Netlink;
  • Unix domain sockets;
  • Wireless networking;
  • eXpress Data Path

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
24.04 noble linux-image-6.8.1-1018-realtime –  6.8.1-1018.19  
linux-image-realtime –  6.8.1-1018.19  
linux-image-realtime-hwe-24.04 –  6.8.1-1018.19  

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References

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