Ubuntu: 5003-1 Critical: Kernel Arbitrary Code Execution Issues

ubuntu

June 23, 2021

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-4.15: Linux kernel for Microsoft Azure Cloud systems

- linux-dell300x: Linux kernel for Dell 300x platforms

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi2: Linux kernel for Raspberry Pi (V8) systems

- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

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

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

Details:

Norbert Slusarek discovered a race condition in the CAN BCM networking

protocol of the Linux kernel leading to multiple use-after-free

vulnerabilities. A local attacker could use this issue to ex...

Read the Full Advisory

Topics Covered

security advisory denial of service kernel update critical arbitrary code execution ubuntu linux kernel

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1022-dell300x  4.15.0-1022.26
  linux-image-4.15.0-1075-oracle  4.15.0-1075.83
  linux-image-4.15.0-1089-raspi2  4.15.0-1089.94
  linux-image-4.15.0-1103-gcp     4.15.0-1103.116
  linux-image-4.15.0-1106-aws     4.15.0-1106.113
  linux-image-4.15.0-1106-snapdragon  4.15.0-1106.115
  linux-image-4.15.0-1118-azure   4.15.0-1118.131
  linux-image-4.15.0-147-generic  4.15.0-147.151
  linux-image-4.15.0-147-generic-lpae  4.15.0-147.151
  linux-image-4.15.0-147-lowlatency  4.15.0-147.151
  linux-image-aws-lts-18.04       4.15.0.1106.109
  linux-image-azure-lts-18.04     4.15.0.1118.91
  linux-image-dell300x            4.15.0.1022.24
  linux-image-gcp-lts-18.04       4.15.0.1103.121
  linux-image-generic             4.15.0.147.134
  linux-image-generic-lpae        4.15.0.147.134
  linux-image-lowlatency          4.15.0.147.134
  linux-image-oracle-lts-18.04    4.15.0.1075.85
  linux-image-raspi2              4.15.0.1089.86
  linux-image-snapdragon          4.15.0.1106.109
  linux-image-virtual             4.15.0.147.134

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1075-oracle  4.15.0-1075.83~16.04.1
  linux-image-4.15.0-1103-gcp     4.15.0-1103.116~16.04.1
  linux-image-4.15.0-1106-aws     4.15.0-1106.113~16.04.1
  linux-image-4.15.0-1118-azure   4.15.0-1118.131~16.04.1
  linux-image-4.15.0-147-generic  4.15.0-147.151~16.04.1
  linux-image-4.15.0-147-lowlatency  4.15.0-147.151~16.04.1
  linux-image-aws-hwe             4.15.0.1106.97
  linux-image-azure               4.15.0.1118.109
  linux-image-gcp                 4.15.0.1103.104
  linux-image-generic-hwe-16.04   4.15.0.147.143
  linux-image-gke                 4.15.0.1103.104
  linux-image-lowlatency-hwe-16.04  4.15.0.147.143
  linux-image-oem                 4.15.0.147.143
  linux-image-oracle              4.15.0.1075.63
  linux-image-virtual-hwe-16.04   4.15.0.147.143

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1118-azure   4.15.0-1118.131~14.04.1
  linux-image-azure               4.15.0.1118.91

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.