Ubuntu 20.04 LTS USN-6495-1 Moderate: Kernel Denial Of Service

ubuntu

November 21, 2023

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-bluefield: Linux kernel for NVIDIA BlueField platforms

- linux-ibm: 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-raspi: Linux kernel for Raspberry Pi systems

- linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors

- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems

- linux-hwe-5.4: Linux hardware enablement (HWE) kernel

- linux-ibm-5.4: Linux kernel for IBM cloud systems

- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

Yu Hao discovered that the UBI driver in the Linux kernel did not properly

check for MTD with zero erasesize during device attachme...

Read the Full Advisory

Topics Covered

security advisory moderate denial of service update kernel ubuntu system crash

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
   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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   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

After a standard system update you need to reboot your computer to make
all the necessary changes.

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.