1. Ubuntu Security Notices
  2. USN-6938-1

USN-6938-1: Linux kernel vulnerabilities

Publication date

31 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-kvm - Linux kernel for cloud environments
  • linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty

Details

It was discovered that the device input subsystem in the Linux kernel did
not properly handle the case when an event code falls outside of a bitmap.
A local attacker could use this to cause a denial of service (system
crash). (CVE-2022-48619)

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,

It was discovered that the device input subsystem in the Linux kernel did
not properly handle the case when an event code falls outside of a bitmap.
A local attacker could use this to cause a denial of service (system
crash). (CVE-2022-48619)

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)

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;
  • Input Device Drivers (Mouse);
  • 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;
  • IPv4 networking;
  • IPv6 networking;
  • Netfilter;
  • Unix domain sockets;
  • Wireless networking

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
16.04 xenial linux-image-4.4.0-1135-kvm –  4.4.0-1135.145  
linux-image-4.4.0-1172-aws –  4.4.0-1172.187  
linux-image-4.4.0-257-generic –  4.4.0-257.291  
linux-image-4.4.0-257-lowlatency –  4.4.0-257.291  
linux-image-aws –  4.4.0.1172.176  
linux-image-generic –  4.4.0.257.263  
linux-image-generic-lts-xenial –  4.4.0.257.263  
linux-image-kvm –  4.4.0.1135.132  
linux-image-lowlatency –  4.4.0.257.263  
linux-image-lowlatency-lts-xenial –  4.4.0.257.263  
linux-image-virtual –  4.4.0.257.263  
linux-image-virtual-lts-xenial –  4.4.0.257.263  
14.04 trusty linux-image-4.4.0-1134-aws –  4.4.0-1134.140  
linux-image-4.4.0-257-generic –  4.4.0-257.291~14.04.1  
linux-image-4.4.0-257-lowlatency –  4.4.0-257.291~14.04.1  
linux-image-aws –  4.4.0.1134.131  
linux-image-generic-lts-xenial –  4.4.0.257.291~14.04.1  
linux-image-lowlatency-lts-xenial –  4.4.0.257.291~14.04.1  
linux-image-virtual-lts-xenial –  4.4.0.257.291~14.04.1  

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

id=“usn”

Have additional questions?

Talk to a member of the team ›