Ubuntu 20.04 & 18.04: 5514-1 Critical: Linux Kernel Denial Of Service

ubuntu

July 13, 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-azure-fde: Linux kernel for Microsoft Azure cloud systems

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-kvm: Linux kernel for cloud environments

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

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

Details:

It was discovered that the implementation of the 6pack and mkiss protocols

in the Linux kernel did not handle detach events properly in some

situations, leading to a use-after-free vulnerability. A local attacker

could possibly use this to cause a denial of service (system crash).

(CVE-2022-1195)

Duoming Zhou discovered that the AX....

Read the Full Advisory

Topics Covered

security advisory denial of service critical ubuntu linux kernel cloud systems

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1029-ibm      5.4.0-1029.33
  linux-image-5.4.0-1049-gkeop    5.4.0-1049.52
  linux-image-5.4.0-1071-kvm      5.4.0-1071.76
  linux-image-5.4.0-1078-gke      5.4.0-1078.84
  linux-image-5.4.0-1081-aws      5.4.0-1081.88
  linux-image-5.4.0-1086-azure    5.4.0-1086.91
  linux-image-5.4.0-1086-azure-fde  5.4.0-1086.91+cvm1.1
  linux-image-5.4.0-122-generic   5.4.0-122.138
  linux-image-5.4.0-122-generic-lpae  5.4.0-122.138
  linux-image-5.4.0-122-lowlatency  5.4.0-122.138
  linux-image-aws-lts-20.04       5.4.0.1081.81
  linux-image-azure-fde           5.4.0.1086.91+cvm1.27
  linux-image-azure-lts-20.04     5.4.0.1086.83
  linux-image-generic             5.4.0.122.123
  linux-image-generic-lpae        5.4.0.122.123
  linux-image-gke                 5.4.0.1078.86
  linux-image-gke-5.4             5.4.0.1078.86
  linux-image-gkeop               5.4.0.1049.50
  linux-image-gkeop-5.4           5.4.0.1049.50
  linux-image-ibm                 5.4.0.1029.58
  linux-image-ibm-lts-20.04       5.4.0.1029.58
  linux-image-kvm                 5.4.0.1071.68
  linux-image-lowlatency          5.4.0.122.123
  linux-image-oem                 5.4.0.122.123
  linux-image-oem-osp1            5.4.0.122.123
  linux-image-virtual             5.4.0.122.123

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1086-azure    5.4.0-1086.91~18.04.1
  linux-image-5.4.0-122-generic   5.4.0-122.138~18.04.1
  linux-image-5.4.0-122-generic-lpae  5.4.0-122.138~18.04.1
  linux-image-5.4.0-122-lowlatency  5.4.0-122.138~18.04.1
  linux-image-azure               5.4.0.1086.63
  linux-image-generic-hwe-18.04   5.4.0.122.138~18.04.102
  linux-image-generic-lpae-hwe-18.04  5.4.0.122.138~18.04.102
  linux-image-lowlatency-hwe-18.04  5.4.0.122.138~18.04.102
  linux-image-oem                 5.4.0.122.138~18.04.102
  linux-image-oem-osp1            5.4.0.122.138~18.04.102
  linux-image-snapdragon-hwe-18.04  5.4.0.122.138~18.04.102
  linux-image-virtual-hwe-18.04   5.4.0.122.138~18.04.102

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.