Ubuntu Security Notices
USN-6495-1

USN-6495-1: Linux kernel vulnerabilities

Publication date

21 November 2023

Overview

Several security issues were fixed in the Linux kernel.

Releases

20.04 LTS 18.04 LTS

Packages

linux - Linux kernel
linux-aws - Linux kernel for Amazon Web Services (AWS) systems
linux-aws-5.4 - Linux kernel for Amazon Web Services (AWS) systems
linux-bluefield - Linux kernel for NVIDIA BlueField platforms
linux-hwe-5.4 - Linux hardware enablement (HWE) kernel
linux-ibm - Linux kernel for IBM cloud systems
linux-ibm-5.4 - Linux kernel for IBM cloud systems
linux-iot - Linux kernel for IoT platforms
linux-kvm - Linux kernel for cloud environments
linux-oracle - Linux kernel for Oracle Cloud systems
linux-oracle-5.4 - Linux kernel for Oracle Cloud systems
linux-raspi - Linux kernel for Raspberry Pi systems
linux-raspi-5.4 - Linux kernel for Raspberry Pi systems
linux-xilinx-zynqmp - Linux kernel for Xilinx ZynqMP processors

Details

Yu Hao discovered that the UBI driver in the Linux kernel did not properly
check for MTD with zero erasesize during device attachment. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-31085)

Manfred Rudigier discovered that the Intel(R) PCI-Express Gigabit (igb)
Ethernet driver in the Linux kernel did not properly validate received
frames that are larger than the set MTU size, leading to a buffer overflow
vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-45871)

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-5.4.0-1026-iot – 5.4.0-1026.27
	linux-image-5.4.0-1034-xilinx-zynqmp – 5.4.0-1034.38
	linux-image-5.4.0-1061-ibm – 5.4.0-1061.66
	linux-image-5.4.0-1075-bluefield – 5.4.0-1075.81
	linux-image-5.4.0-1098-raspi – 5.4.0-1098.110
	linux-image-5.4.0-1103-kvm – 5.4.0-1103.110
	linux-image-5.4.0-1113-oracle – 5.4.0-1113.122
	linux-image-5.4.0-1114-aws – 5.4.0-1114.124
	linux-image-5.4.0-167-generic – 5.4.0-167.184
	linux-image-5.4.0-167-generic-lpae – 5.4.0-167.184
	linux-image-5.4.0-167-lowlatency – 5.4.0-167.184
	linux-image-aws-lts-20.04 – 5.4.0.1114.111
	linux-image-bluefield – 5.4.0.1075.70
	linux-image-generic – 5.4.0.167.164
	linux-image-generic-lpae – 5.4.0.167.164
	linux-image-ibm-lts-20.04 – 5.4.0.1061.90
	linux-image-kvm – 5.4.0.1103.99
	linux-image-lowlatency – 5.4.0.167.164
	linux-image-oem – 5.4.0.167.164
	linux-image-oem-osp1 – 5.4.0.167.164
	linux-image-oracle-lts-20.04 – 5.4.0.1113.106
	linux-image-raspi – 5.4.0.1098.128
	linux-image-raspi2 – 5.4.0.1098.128
	linux-image-virtual – 5.4.0.167.164
	linux-image-xilinx-zynqmp – 5.4.0.1034.34
18.04 bionic	linux-image-5.4.0-1061-ibm – 5.4.0-1061.66~18.04.1
	linux-image-5.4.0-1098-raspi – 5.4.0-1098.110~18.04.2
	linux-image-5.4.0-1113-oracle – 5.4.0-1113.122~18.04.1
	linux-image-5.4.0-1114-aws – 5.4.0-1114.124~18.04.1
	linux-image-5.4.0-167-generic – 5.4.0-167.184~18.04.1
	linux-image-5.4.0-167-lowlatency – 5.4.0-167.184~18.04.1
	linux-image-aws – 5.4.0.1114.92
	linux-image-generic-hwe-18.04 – 5.4.0.167.184~18.04.135
	linux-image-ibm – 5.4.0.1061.72
	linux-image-lowlatency-hwe-18.04 – 5.4.0.167.184~18.04.135
	linux-image-oem – 5.4.0.167.184~18.04.135
	linux-image-oem-osp1 – 5.4.0.167.184~18.04.135
	linux-image-oracle – 5.4.0.1113.122~18.04.85
	linux-image-raspi-hwe-18.04 – 5.4.0.1098.95
	linux-image-snapdragon-hwe-18.04 – 5.4.0.167.184~18.04.135
	linux-image-virtual-hwe-18.04 – 5.4.0.167.184~18.04.135

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References

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