Ubuntu 20.04 LTS USN-5728-1 Critical: Linux Kernel Memory Issues

ubuntu

November 16, 2022

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-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-bluefield: Linux kernel for NVIDIA BlueField platforms

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

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

- linux-azure-5.4: Linux kernel for Microsoft Azure cloud 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

Details:

Jann Horn discovered that the Linux kernel did not properly track memory

allocations for anonymous VMA ...

Read the Full Advisory

Topics Covered

security advisory denial of service code execution kernel memory management 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-5.4.0-1037-ibm      5.4.0-1037.42
  linux-image-5.4.0-1050-bluefield  5.4.0-1050.56
  linux-image-5.4.0-1074-raspi    5.4.0-1074.85
  linux-image-5.4.0-1079-kvm      5.4.0-1079.85
  linux-image-5.4.0-1087-oracle   5.4.0-1087.96
  linux-image-5.4.0-1089-aws      5.4.0-1089.97
  linux-image-5.4.0-1093-gcp      5.4.0-1093.102
  linux-image-5.4.0-1095-azure    5.4.0-1095.101
  linux-image-5.4.0-132-generic   5.4.0-132.148
  linux-image-5.4.0-132-generic-lpae  5.4.0-132.148
  linux-image-5.4.0-132-lowlatency  5.4.0-132.148
  linux-image-aws-lts-20.04       5.4.0.1089.88
  linux-image-azure-lts-20.04     5.4.0.1095.91
  linux-image-bluefield           5.4.0.1050.48
  linux-image-gcp-lts-20.04       5.4.0.1093.97
  linux-image-generic             5.4.0.132.132
  linux-image-generic-lpae        5.4.0.132.132
  linux-image-ibm                 5.4.0.1037.65
  linux-image-ibm-lts-20.04       5.4.0.1037.65
  linux-image-kvm                 5.4.0.1079.75
  linux-image-lowlatency          5.4.0.132.132
  linux-image-oem                 5.4.0.132.132
  linux-image-oem-osp1            5.4.0.132.132
  linux-image-oracle-lts-20.04    5.4.0.1087.83
  linux-image-raspi               5.4.0.1074.106
  linux-image-raspi2              5.4.0.1074.106
  linux-image-virtual             5.4.0.132.132

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1037-ibm      5.4.0-1037.42~18.04.1
  linux-image-5.4.0-1087-oracle   5.4.0-1087.96~18.04.1
  linux-image-5.4.0-1089-aws      5.4.0-1089.97~18.04.1
  linux-image-5.4.0-1095-azure    5.4.0-1095.101~18.04.1
  linux-image-5.4.0-132-generic   5.4.0-132.148~18.04.1
  linux-image-5.4.0-132-generic-lpae  5.4.0-132.148~18.04.1
  linux-image-5.4.0-132-lowlatency  5.4.0-132.148~18.04.1
  linux-image-aws                 5.4.0.1089.68
  linux-image-azure               5.4.0.1095.71
  linux-image-generic-hwe-18.04   5.4.0.132.148~18.04.109
  linux-image-generic-lpae-hwe-18.04  5.4.0.132.148~18.04.109
  linux-image-ibm                 5.4.0.1037.50
  linux-image-lowlatency-hwe-18.04  5.4.0.132.148~18.04.109
  linux-image-oem                 5.4.0.132.148~18.04.109
  linux-image-oem-osp1            5.4.0.132.148~18.04.109
  linux-image-oracle              5.4.0.1087.96~18.04.63
  linux-image-snapdragon-hwe-18.04  5.4.0.132.148~18.04.109
  linux-image-virtual-hwe-18.04   5.4.0.132.148~18.04.109

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.