1. Ubuntu Security Notices
  2. USN-6926-1

USN-6926-1: Linux kernel vulnerabilities

Publication date

29 July 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gcp-4.15 - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-hwe - Linux hardware enablement (HWE) kernel
  • linux-kvm - Linux kernel for cloud environments
  • linux-oracle - Linux kernel for Oracle Cloud systems

Details

黄思聪 discovered that the NFC Controller Interface (NCI) implementation in
the Linux kernel did not properly handle certain memory allocation failure
conditions, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-46343)

It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel when modifying certain settings values through debugfs.
A privileged local attacker could use this to cause a denial of service.
(CVE-2024-24857, CVE-2024-24858, CVE-2024-24859)

Chenyuan Yang discovered that the Unsorted Block Images (UBI) flash device
volume management subsystem did not properly validate logical eraseblock
sizes in certain situations. An attacker could possibly use...

黄思聪 discovered that the NFC Controller Interface (NCI) implementation in
the Linux kernel did not properly handle certain memory allocation failure
conditions, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-46343)

It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel when modifying certain settings values through debugfs.
A privileged local attacker could use this to cause a denial of service.
(CVE-2024-24857, CVE-2024-24858, CVE-2024-24859)

Chenyuan Yang discovered that the Unsorted Block Images (UBI) flash device
volume management subsystem did not properly validate logical eraseblock
sizes in certain situations. An attacker could possibly use this to cause a
denial of service (system crash). (CVE-2024-25739)

Supraja Sridhara, Benedict Schlüter, Mark Kuhne, Andrin Bertschi, and
Shweta Shinde discovered that the Confidential Computing framework in the
Linux kernel for x86 platforms did not properly handle 32-bit emulation on
TDX and SEV. An attacker with access to the VMM could use this to cause a
denial of service (guest crash) or possibly execute arbitrary code.
(CVE-2024-25744)

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:

  • GPU drivers;
  • HID subsystem;
  • I2C subsystem;
  • MTD block device drivers;
  • Network drivers;
  • TTY drivers;
  • USB subsystem;
  • File systems infrastructure;
  • F2FS file system;
  • SMB network file system;
  • BPF subsystem;
  • B.A.T.M.A.N. meshing protocol;
  • Bluetooth subsystem;
  • Networking core;
  • IPv4 networking;
  • IPv6 networking;
  • Netfilter;
  • Unix domain sockets;
  • AppArmor security module

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
18.04 bionic linux-image-4.15.0-1133-oracle –  4.15.0-1133.144  
linux-image-4.15.0-1154-kvm –  4.15.0-1154.159  
linux-image-4.15.0-1164-gcp –  4.15.0-1164.181  
linux-image-4.15.0-1170-aws –  4.15.0-1170.183  
linux-image-4.15.0-227-generic –  4.15.0-227.239  
linux-image-4.15.0-227-lowlatency –  4.15.0-227.239  
linux-image-aws-lts-18.04 –  4.15.0.1170.168  
linux-image-gcp-lts-18.04 –  4.15.0.1164.177  
linux-image-generic –  4.15.0.227.211  
linux-image-kvm –  4.15.0.1154.145  
linux-image-lowlatency –  4.15.0.227.211  
linux-image-oracle-lts-18.04 –  4.15.0.1133.138  
linux-image-virtual –  4.15.0.227.211  
16.04 xenial linux-image-4.15.0-1133-oracle –  4.15.0-1133.144~16.04.1  
linux-image-4.15.0-1164-gcp –  4.15.0-1164.181~16.04.1  
linux-image-4.15.0-1170-aws –  4.15.0-1170.183~16.04.1  
linux-image-4.15.0-227-generic –  4.15.0-227.239~16.04.1  
linux-image-4.15.0-227-lowlatency –  4.15.0-227.239~16.04.1  
linux-image-aws-hwe –  4.15.0.1170.183~16.04.1  
linux-image-gcp –  4.15.0.1164.181~16.04.1  
linux-image-generic-hwe-16.04 –  4.15.0.227.239~16.04.1  
linux-image-gke –  4.15.0.1164.181~16.04.1  
linux-image-lowlatency-hwe-16.04 –  4.15.0.227.239~16.04.1  
linux-image-oem –  4.15.0.227.239~16.04.1  
linux-image-oracle –  4.15.0.1133.144~16.04.1  
linux-image-virtual-hwe-16.04 –  4.15.0.227.239~16.04.1  

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References

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