Ubuntu Security Notices
USN-8570-1

USN-8570-1: Linux kernel vulnerabilities

Publication date

20 July 2026

Overview

Several security issues were fixed in the Linux kernel.

Releases

24.04 LTS

Packages

linux-gcp-6.17 - Linux kernel for Google Cloud Platform (GCP) systems
linux-realtime-6.17 - 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:

Foo-over-UDP (FOU);
ARM64 architecture;
x86 architecture;
Block layer subsystem;
Drivers core;
Null block device driver;
Bluetooth drivers;
Counter interface drivers;
DMA engine subsystem;
DPLL subsystem;
GPIO subsystem;
GPU drivers;
I2C subsystem;
IIO ADC drivers;
IIO subsystem;
On-Chip Interconnect management framework;
IOMMU subsystem;
IRQ chip drivers;
Modular ISDN driver;
LED subsystem;
Multiple devices driver;
UACCE accelerator framework;
MMC subsystem;
Ethernet bonding driver;
Network drivers;
Mellanox network drivers;
NVME...

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:

Foo-over-UDP (FOU);
ARM64 architecture;
x86 architecture;
Block layer subsystem;
Drivers core;
Null block device driver;
Bluetooth drivers;
Counter interface drivers;
DMA engine subsystem;
DPLL subsystem;
GPIO subsystem;
GPU drivers;
I2C subsystem;
IIO ADC drivers;
IIO subsystem;
On-Chip Interconnect management framework;
IOMMU subsystem;
IRQ chip drivers;
Modular ISDN driver;
LED subsystem;
Multiple devices driver;
UACCE accelerator framework;
MMC subsystem;
Ethernet bonding driver;
Network drivers;
Mellanox network drivers;
NVME drivers;
Device tree and open firmware driver;
PHY drivers;
x86 platform drivers;
i.MX PM domains;
SCSI subsystem;
SLIMbus drivers;
SPI subsystem;
TTY drivers;
USB Host Controller drivers;
W1 Dallas's 1-wire bus driver;
Xen hypervisor drivers;
BTRFS file system;
EFI Variable file system;
Ext4 file system;
File systems infrastructure;
FUSE (File system in Userspace);
Network file systems library;
Network file system (NFS) client;
Network file system (NFS) server daemon;
SMB network file system;
Memory Management;
Memory management;
Scheduler infrastructure;
Tracing infrastructure;
Netfilter;
NFC subsystem;
io_uring subsystem;
Perf events;
Hibernation control;
Timer subsystem;
BPF subsystem;
Floating proportions library;
Bluetooth subsystem;
CAN network layer;
Ceph Core library;
Networking core;
IPv4 networking;
IPv6 networking;
L2TP protocol;
MAC80211 subsystem;
Multipath TCP;
NET/ROM layer;
RxRPC session sockets;
Network traffic control;
SCTP protocol;
VMware vSockets driver;
Wireless networking;
ALSA AC97 driver;
Creative Sound Blaster X-Fi driver;
Texas InstrumentS Audio (ASoC/HDA) drivers;
USB sound devices

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 LTS noble	linux-image-6.17.0-1018-realtime – 6.17.0-1018.20~24.04.1
	linux-image-6.17.0-1021-gcp – 6.17.0-1021.24~24.04.1
	linux-image-6.17.0-1021-gcp-64k – 6.17.0-1021.24~24.04.1
	linux-image-gcp – 6.17.0-1021.24~24.04.1
	linux-image-gcp-6.17 – 6.17.0-1021.24~24.04.1
	linux-image-gcp-64k – 6.17.0-1021.24~24.04.1
	linux-image-gcp-64k-6.17 – 6.17.0-1021.24~24.04.1
	linux-image-realtime-6.17 – 6.17.0-1018.20~24.04.1
	linux-image-realtime-hwe-24.04 – 6.17.0-1018.20~24.04.1