USN-7159-1: Linux kernel vulnerabilities

USN-7159-1: Linux kernel vulnerabilities
12 December 2024

Several security issues were fixed in the Linux kernel.

Releases

• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• linux - Linux kernel
• linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
• linux-gcp-5.4 - Linux kernel for Google Cloud Platform (GCP) systems
• linux-hwe-5.4 - Linux hardware enablement (HWE) kernel
• linux-ibm - Linux kernel for IBM cloud systems
• linux-ibm-5.4 - Linux kernel for IBM cloud systems
• linux-kvm - Linux kernel for cloud environments
• linux-raspi - Linux kernel for Raspberry Pi systems
• linux-xilinx-zynqmp - Linux kernel for Xilinx ZynqMP processors

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:

• ARM32 architecture;
• ARM64 architecture;
• S390 architecture;
• x86 architecture;
• Power management core;
• GPU drivers;
• InfiniBand drivers;
• Network drivers;
• S/390 drivers;
• TTY drivers;
• BTRFS file system;
• EROFS file system;
• F2FS file system;
• File systems infrastructure;
• BPF subsystem;
• Socket messages infrastructure;
• Bluetooth subsystem;
• Ethernet bridge;
• Networking core;
• IPv4 networking;

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

Ubuntu 20.04

• linux-image-5.4.0-1055-xilinx-zynqmp - 5.4.0-1055.59
• linux-image-5.4.0-1083-ibm - 5.4.0-1083.88
• linux-image-5.4.0-1120-raspi - 5.4.0-1120.132
• linux-image-5.4.0-1124-kvm - 5.4.0-1124.132
• linux-image-5.4.0-1140-gcp - 5.4.0-1140.149
• linux-image-5.4.0-202-generic - 5.4.0-202.222
• linux-image-5.4.0-202-generic-lpae - 5.4.0-202.222
• linux-image-5.4.0-202-lowlatency - 5.4.0-202.222
• linux-image-gcp-lts-20.04 - 5.4.0.1140.142
• linux-image-generic - 5.4.0.202.198
• linux-image-generic-lpae - 5.4.0.202.198
• linux-image-ibm-lts-20.04 - 5.4.0.1083.112
• linux-image-kvm - 5.4.0.1124.120
• linux-image-lowlatency - 5.4.0.202.198
• linux-image-oem - 5.4.0.202.198
• linux-image-oem-osp1 - 5.4.0.202.198
• linux-image-raspi - 5.4.0.1120.150
• linux-image-raspi2 - 5.4.0.1120.150
• linux-image-virtual - 5.4.0.202.198
• linux-image-xilinx-zynqmp - 5.4.0.1055.55

Ubuntu 18.04

• linux-image-5.4.0-1083-ibm - 5.4.0-1083.88~18.04.1
• linux-image-5.4.0-1140-gcp - 5.4.0-1140.149~18.04.1
• linux-image-5.4.0-202-generic - 5.4.0-202.222~18.04.1
• linux-image-5.4.0-202-lowlatency - 5.4.0-202.222~18.04.1
• linux-image-gcp - 5.4.0.1140.149~18.04.1
• linux-image-generic-hwe-18.04 - 5.4.0.202.222~18.04.1
• linux-image-ibm - 5.4.0.1083.88~18.04.1
• linux-image-lowlatency-hwe-18.04 - 5.4.0.202.222~18.04.1
• linux-image-oem - 5.4.0.202.222~18.04.1
• linux-image-oem-osp1 - 5.4.0.202.222~18.04.1
• linux-image-snapdragon-hwe-18.04 - 5.4.0.202.222~18.04.1
• linux-image-virtual-hwe-18.04 - 5.4.0.202.222~18.04.1

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.