1. Ubuntu Security Notices
  2. USN-7183-1

USN-7183-1: Linux kernel vulnerabilities

Publication date

6 January 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Andy Nguyen discovered that the Bluetooth L2CAP implementation in the Linux
kernel contained a type-confusion error. A physically proximate remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2020-12351)

Andy Nguyen discovered that the Bluetooth A2MP implementation in the Linux
kernel did not properly initialize memory in some situations. A physically
proximate remote attacker could use this to expose sensitive information
(kernel memory). (CVE-2020-12352)

Andy Nguyen discovered that the Bluetooth HCI event packet parser in the
Linux kernel did not properly handle event advertisements of certain sizes,
leading to a heap-based buffer overflow. A physically proximate remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (

Andy Nguyen discovered that the Bluetooth L2CAP implementation in the Linux
kernel contained a type-confusion error. A physically proximate remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2020-12351)

Andy Nguyen discovered that the Bluetooth A2MP implementation in the Linux
kernel did not properly initialize memory in some situations. A physically
proximate remote attacker could use this to expose sensitive information
(kernel memory). (CVE-2020-12352)

Andy Nguyen discovered that the Bluetooth HCI event packet parser in the
Linux kernel did not properly handle event advertisements of certain sizes,
leading to a heap-based buffer overflow. A physically proximate remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2020-24490)

Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux
kernel contained an integer overflow vulnerability. A local attacker could
use this to cause a denial of service (system crash). (CVE-2022-36402)

Zheng Wang discovered a use-after-free in the Renesas Ethernet AVB driver
in the Linux kernel during device removal. A privileged attacker could use
this to cause a denial of service (system crash). (CVE-2023-35827)

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;
  • I2C subsystem;
  • Network drivers;
  • Pin controllers subsystem;
  • TTY drivers;
  • USB Mass Storage drivers;
  • Framebuffer layer;
  • Ext4 file system;
  • File systems infrastructure;
  • Bluetooth subsystem;
  • Kernel init infrastructure;
  • DMA mapping infrastructure;
  • Memory management;
  • 9P file system network protocol;
  • IPv4 networking;
  • IPv6 networking;
  • Logical Link layer;
  • MAC80211 subsystem;
  • Netfilter;
  • NFC subsystem;
  • Phonet protocol;
  • Network traffic control;
  • 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-4.4.0-262-generic –  4.4.0-262.296  
linux-image-4.4.0-262-lowlatency –  4.4.0-262.296  
linux-image-generic –  4.4.0.262.268  
linux-image-generic-lts-xenial –  4.4.0.262.268  
linux-image-lowlatency –  4.4.0.262.268  
linux-image-lowlatency-lts-xenial –  4.4.0.262.268  
linux-image-virtual –  4.4.0.262.268  
linux-image-virtual-lts-xenial –  4.4.0.262.268  
14.04 trusty linux-image-4.4.0-262-generic –  4.4.0-262.296~14.04.1  
linux-image-4.4.0-262-lowlatency –  4.4.0-262.296~14.04.1  
linux-image-generic-lts-xenial –  4.4.0.262.296~14.04.1  
linux-image-lowlatency-lts-xenial –  4.4.0.262.296~14.04.1  
linux-image-virtual-lts-xenial –  4.4.0.262.296~14.04.1  

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References

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