1. Ubuntu Security Notices
  2. USN-6462-1

USN-6462-1: Linux kernel vulnerabilities

Publication date

31 October 2023

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Seth Jenkins discovered that the Linux kernel did not properly perform
address randomization for a per-cpu memory management structure. A local
attacker could use this to expose sensitive information (kernel memory) or
in conjunction with another kernel vulnerability. (CVE-2023-0597)

Yu Hao and Weiteng Chen discovered that the Bluetooth HCI UART driver in
the Linux kernel contained a race condition, leading to a null pointer
dereference vulnerability. A local attacker could use this to cause a
denial of service (system crash). (CVE-2023-31083)

Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the
Linux kernel contained a null pointer dereference vulnerability in some
situations. A local privileged attacker could use this to cause a denial of
service (system crash). (CVE-2023-3772)

It was...

Seth Jenkins discovered that the Linux kernel did not properly perform
address randomization for a per-cpu memory management structure. A local
attacker could use this to expose sensitive information (kernel memory) or
in conjunction with another kernel vulnerability. (CVE-2023-0597)

Yu Hao and Weiteng Chen discovered that the Bluetooth HCI UART driver in
the Linux kernel contained a race condition, leading to a null pointer
dereference vulnerability. A local attacker could use this to cause a
denial of service (system crash). (CVE-2023-31083)

Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the
Linux kernel contained a null pointer dereference vulnerability in some
situations. A local privileged attacker could use this to cause a denial of
service (system crash). (CVE-2023-3772)

It was discovered that the Siano USB MDTV receiver device driver in the
Linux kernel did not properly handle device initialization failures in
certain situations, leading to a use-after-free vulnerability. A physically
proximate attacker could use this cause a denial of service (system crash).
(CVE-2023-4132)

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-5.4.0-1033-xilinx-zynqmp –  5.4.0-1033.37
linux-image-5.4.0-1060-ibm –  5.4.0-1060.65
linux-image-5.4.0-1074-bluefield –  5.4.0-1074.80
linux-image-5.4.0-1080-gkeop –  5.4.0-1080.84
linux-image-5.4.0-1097-raspi –  5.4.0-1097.109
linux-image-5.4.0-1102-kvm –  5.4.0-1102.108
linux-image-5.4.0-1112-oracle –  5.4.0-1112.121
linux-image-5.4.0-1113-aws –  5.4.0-1113.123
linux-image-5.4.0-1117-gcp –  5.4.0-1117.126
linux-image-5.4.0-1119-azure –  5.4.0-1119.126
linux-image-5.4.0-166-generic –  5.4.0-166.183
linux-image-5.4.0-166-generic-lpae –  5.4.0-166.183
linux-image-5.4.0-166-lowlatency –  5.4.0-166.183
linux-image-aws-lts-20.04 –  5.4.0.1113.110
linux-image-azure-lts-20.04 –  5.4.0.1119.112
linux-image-bluefield –  5.4.0.1074.69
linux-image-gcp-lts-20.04 –  5.4.0.1117.119
linux-image-generic –  5.4.0.166.163
linux-image-generic-lpae –  5.4.0.166.163
linux-image-gkeop –  5.4.0.1080.78
linux-image-gkeop-5.4 –  5.4.0.1080.78
linux-image-ibm-lts-20.04 –  5.4.0.1060.89
linux-image-kvm –  5.4.0.1102.97
linux-image-lowlatency –  5.4.0.166.163
linux-image-oem –  5.4.0.166.163
linux-image-oem-osp1 –  5.4.0.166.163
linux-image-oracle-lts-20.04 –  5.4.0.1112.105
linux-image-raspi –  5.4.0.1097.127
linux-image-raspi2 –  5.4.0.1097.127
linux-image-virtual –  5.4.0.166.163
linux-image-xilinx-zynqmp –  5.4.0.1033.33
18.04 bionic linux-image-5.4.0-1060-ibm –  5.4.0-1060.65~18.04.1  
linux-image-5.4.0-1097-raspi –  5.4.0-1097.109~18.04.2  
linux-image-5.4.0-1112-oracle –  5.4.0-1112.121~18.04.4  
linux-image-5.4.0-1113-aws –  5.4.0-1113.123~18.04.1  
linux-image-5.4.0-1117-gcp –  5.4.0-1117.126~18.04.1  
linux-image-5.4.0-1119-azure –  5.4.0-1119.126~18.04.2  
linux-image-5.4.0-166-generic –  5.4.0-166.183~18.04.2  
linux-image-5.4.0-166-lowlatency –  5.4.0-166.183~18.04.2  
linux-image-aws –  5.4.0.1113.91  
linux-image-azure –  5.4.0.1119.92  
linux-image-gcp –  5.4.0.1117.93  
linux-image-generic-hwe-18.04 –  5.4.0.166.183~18.04.134  
linux-image-ibm –  5.4.0.1060.71  
linux-image-lowlatency-hwe-18.04 –  5.4.0.166.183~18.04.134  
linux-image-oem –  5.4.0.166.183~18.04.134  
linux-image-oem-osp1 –  5.4.0.166.183~18.04.134  
linux-image-oracle –  5.4.0.1112.121~18.04.84  
linux-image-raspi-hwe-18.04 –  5.4.0.1097.94  
linux-image-snapdragon-hwe-18.04 –  5.4.0.166.183~18.04.134  
linux-image-virtual-hwe-18.04 –  5.4.0.166.183~18.04.134  

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References

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