1. Ubuntu Security Notices
  2. USN-6776-1

USN-6776-1: Linux kernel vulnerabilities

Publication date

16 May 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Zheng Wang discovered that the Broadcom FullMAC WLAN driver in the Linux
kernel contained a race condition during device removal, leading to a use-
after-free vulnerability. A physically proximate attacker could possibly
use this to cause a denial of service (system crash). (CVE-2023-47233)

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:

  • Networking core;
  • IPv4 networking;
  • MAC80211 subsystem;
  • Tomoyo security module

Zheng Wang discovered that the Broadcom FullMAC WLAN driver in the Linux
kernel contained a race condition during device removal, leading to a use-
after-free vulnerability. A physically proximate attacker could possibly
use this to cause a denial of service (system crash). (CVE-2023-47233)

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:

  • Networking core;
  • IPv4 networking;
  • MAC80211 subsystem;
  • Tomoyo 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
20.04 focal linux-image-5.4.0-1037-iot –  5.4.0-1037.38
linux-image-5.4.0-1044-xilinx-zynqmp –  5.4.0-1044.48
linux-image-5.4.0-1072-ibm –  5.4.0-1072.77
linux-image-5.4.0-1085-bluefield –  5.4.0-1085.92
linux-image-5.4.0-1092-gkeop –  5.4.0-1092.96
linux-image-5.4.0-1109-raspi –  5.4.0-1109.121
linux-image-5.4.0-1113-kvm –  5.4.0-1113.120
linux-image-5.4.0-1124-oracle –  5.4.0-1124.133
linux-image-5.4.0-1125-aws –  5.4.0-1125.135
linux-image-5.4.0-1129-gcp –  5.4.0-1129.138
linux-image-5.4.0-1130-azure –  5.4.0-1130.137
linux-image-5.4.0-182-generic –  5.4.0-182.202
linux-image-5.4.0-182-generic-lpae –  5.4.0-182.202
linux-image-5.4.0-182-lowlatency –  5.4.0-182.202
linux-image-aws-lts-20.04 –  5.4.0.1125.122
linux-image-azure-lts-20.04 –  5.4.0.1130.124
linux-image-bluefield –  5.4.0.1085.81
linux-image-gcp-lts-20.04 –  5.4.0.1129.131
linux-image-generic –  5.4.0.182.180
linux-image-generic-lpae –  5.4.0.182.180
linux-image-gkeop –  5.4.0.1092.90
linux-image-gkeop-5.4 –  5.4.0.1092.90
linux-image-ibm-lts-20.04 –  5.4.0.1072.101
linux-image-kvm –  5.4.0.1113.109
linux-image-lowlatency –  5.4.0.182.180
linux-image-oem –  5.4.0.182.180
linux-image-oem-osp1 –  5.4.0.182.180
linux-image-oracle-lts-20.04 –  5.4.0.1124.117
linux-image-raspi –  5.4.0.1109.139
linux-image-raspi2 –  5.4.0.1109.139
linux-image-virtual –  5.4.0.182.180
linux-image-xilinx-zynqmp –  5.4.0.1044.44
18.04 bionic linux-image-5.4.0-1072-ibm –  5.4.0-1072.77~18.04.1  
linux-image-5.4.0-1109-raspi –  5.4.0-1109.121~18.04.1  
linux-image-5.4.0-1124-oracle –  5.4.0-1124.133~18.04.1  
linux-image-5.4.0-1125-aws –  5.4.0-1125.135~18.04.1  
linux-image-5.4.0-1129-gcp –  5.4.0-1129.138~18.04.1  
linux-image-5.4.0-1130-azure –  5.4.0-1130.137~18.04.1  
linux-image-5.4.0-182-generic –  5.4.0-182.202~18.04.1  
linux-image-5.4.0-182-lowlatency –  5.4.0-182.202~18.04.1  
linux-image-aws –  5.4.0.1125.135~18.04.1  
linux-image-azure –  5.4.0.1130.137~18.04.1  
linux-image-gcp –  5.4.0.1129.138~18.04.1  
linux-image-generic-hwe-18.04 –  5.4.0.182.202~18.04.1  
linux-image-ibm –  5.4.0.1072.77~18.04.1  
linux-image-lowlatency-hwe-18.04 –  5.4.0.182.202~18.04.1  
linux-image-oem –  5.4.0.182.202~18.04.1  
linux-image-oem-osp1 –  5.4.0.182.202~18.04.1  
linux-image-oracle –  5.4.0.1124.133~18.04.1  
linux-image-raspi-hwe-18.04 –  5.4.0.1109.121~18.04.1  
linux-image-snapdragon-hwe-18.04 –  5.4.0.182.202~18.04.1  
linux-image-virtual-hwe-18.04 –  5.4.0.182.202~18.04.1  

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References

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