1. Ubuntu Security Notices
  2. USN-6976-1

USN-6976-1: Linux kernel vulnerabilities

Publication date

21 August 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

Yuxuan Hu discovered that the Bluetooth RFCOMM protocol driver in the Linux
Kernel contained a race condition, leading to a NULL pointer dereference.
An attacker could possibly use this to cause a denial of service (system
crash). (CVE-2024-22099)

It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel, leading to a null pointer dereference vulnerability. A
privileged local attacker could use this to possibly cause a denial of
service (system crash). (CVE-2024-24860)

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:

  • SuperH RISC architecture;
  • User-Mode Linux (UML);
  • GPU drivers;
  • HID subsystem;
  • MMC subsystem;
  • Network...

Yuxuan Hu discovered that the Bluetooth RFCOMM protocol driver in the Linux
Kernel contained a race condition, leading to a NULL pointer dereference.
An attacker could possibly use this to cause a denial of service (system
crash). (CVE-2024-22099)

It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel, leading to a null pointer dereference vulnerability. A
privileged local attacker could use this to possibly cause a denial of
service (system crash). (CVE-2024-24860)

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:

  • SuperH RISC architecture;
  • User-Mode Linux (UML);
  • GPU drivers;
  • HID subsystem;
  • MMC subsystem;
  • Network drivers;
  • PHY drivers;
  • SCSI drivers;
  • USB subsystem;
  • Xen hypervisor drivers;
  • GFS2 file system;
  • Memory management;
  • Bluetooth subsystem;
  • IPv4 networking;
  • IPv6 networking;
  • NFC subsystem;
  • HD-audio driver;
  • ALSA SH drivers

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 LTS xenial linux-image-4.4.0-1136-kvm –  4.4.0-1136.146  
linux-image-4.4.0-1173-aws –  4.4.0-1173.188  
linux-image-4.4.0-258-generic –  4.4.0-258.292  
linux-image-4.4.0-258-lowlatency –  4.4.0-258.292  
linux-image-aws –  4.4.0.1173.177  
linux-image-generic –  4.4.0.258.264  
linux-image-generic-lts-xenial –  4.4.0.258.264  
linux-image-kvm –  4.4.0.1136.133  
linux-image-lowlatency –  4.4.0.258.264  
linux-image-lowlatency-lts-xenial –  4.4.0.258.264  
linux-image-virtual –  4.4.0.258.264  
linux-image-virtual-lts-xenial –  4.4.0.258.264  
14.04 LTS trusty linux-image-4.4.0-1135-aws –  4.4.0-1135.141  
linux-image-4.4.0-258-generic –  4.4.0-258.292~14.04.2  
linux-image-4.4.0-258-lowlatency –  4.4.0-258.292~14.04.2  
linux-image-aws –  4.4.0.1135.132  
linux-image-generic-lts-xenial –  4.4.0.258.292~14.04.2  
linux-image-lowlatency-lts-xenial –  4.4.0.258.292~14.04.2  
linux-image-virtual-lts-xenial –  4.4.0.258.292~14.04.2  

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References

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