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Ubuntu Security Notice USN-5135-1

Ubuntu Security Notice USN-5135-1
Posted Nov 9, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5135-1 - It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC objects. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-3759
MD5 | d9820f169198a88c02d3751e33929633

Ubuntu Security Notice USN-5135-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-5135-1
November 09, 2021

linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11,
linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oem-5.13,
linux-oracle, linux-oracle-5.11 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS

Summary:

The system could be made to crash under certain conditions.

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-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-aws-5.11: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.11: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-5.11: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.11: Linux hardware enablement (HWE) kernel
- linux-oem-5.13: Linux kernel for OEM systems
- linux-oracle-5.11: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the Linux kernel did not properly account for the
memory usage of certain IPC objects. A local attacker could use this to
cause a denial of service (memory exhaustion).

Update instructions:

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

Ubuntu 21.10:
linux-image-5.13.0-1005-kvm 5.13.0-1005.5
linux-image-5.13.0-1006-aws 5.13.0-1006.7
linux-image-5.13.0-1006-gcp 5.13.0-1006.7
linux-image-5.13.0-1007-azure 5.13.0-1007.8
linux-image-5.13.0-1009-oracle 5.13.0-1009.11
linux-image-5.13.0-21-generic 5.13.0-21.21
linux-image-5.13.0-21-generic-64k 5.13.0-21.21
linux-image-5.13.0-21-generic-lpae 5.13.0-21.21
linux-image-5.13.0-21-lowlatency 5.13.0-21.21
linux-image-aws 5.13.0.1006.8
linux-image-azure 5.13.0.1007.8
linux-image-gcp 5.13.0.1006.7
linux-image-generic 5.13.0.21.32
linux-image-generic-64k 5.13.0.21.32
linux-image-generic-lpae 5.13.0.21.32
linux-image-gke 5.13.0.1006.7
linux-image-kvm 5.13.0.1005.5
linux-image-lowlatency 5.13.0.21.32
linux-image-oem-20.04 5.13.0.21.32
linux-image-oracle 5.13.0.1009.11
linux-image-virtual 5.13.0.21.32

Ubuntu 21.04:
linux-image-5.11.0-1019-kvm 5.11.0-1019.21
linux-image-5.11.0-1021-aws 5.11.0-1021.22
linux-image-5.11.0-1021-azure 5.11.0-1021.22
linux-image-5.11.0-1021-oracle 5.11.0-1021.22
linux-image-5.11.0-1022-gcp 5.11.0-1022.24
linux-image-5.11.0-40-generic 5.11.0-40.44
linux-image-5.11.0-40-generic-64k 5.11.0-40.44
linux-image-5.11.0-40-generic-lpae 5.11.0-40.44
linux-image-5.11.0-40-lowlatency 5.11.0-40.44
linux-image-aws 5.11.0.1021.22
linux-image-azure 5.11.0.1021.22
linux-image-gcp 5.11.0.1022.22
linux-image-generic 5.11.0.40.41
linux-image-generic-64k 5.11.0.40.41
linux-image-generic-lpae 5.11.0.40.41
linux-image-gke 5.11.0.1022.22
linux-image-kvm 5.11.0.1019.20
linux-image-lowlatency 5.11.0.40.41
linux-image-oem-20.04 5.11.0.40.41
linux-image-oracle 5.11.0.1021.22
linux-image-virtual 5.11.0.40.41

Ubuntu 20.04 LTS:
linux-image-5.11.0-1021-aws 5.11.0-1021.22~20.04.2
linux-image-5.11.0-1021-azure 5.11.0-1021.22~20.04.1
linux-image-5.11.0-1021-oracle 5.11.0-1021.22~20.04.1
linux-image-5.11.0-1022-gcp 5.11.0-1022.24~20.04.1
linux-image-5.11.0-40-generic 5.11.0-40.44~20.04.2
linux-image-5.11.0-40-generic-64k 5.11.0-40.44~20.04.2
linux-image-5.11.0-40-generic-lpae 5.11.0-40.44~20.04.2
linux-image-5.11.0-40-lowlatency 5.11.0-40.44~20.04.2
linux-image-5.13.0-1019-oem 5.13.0-1019.23
linux-image-aws 5.11.0.1021.22~20.04.20
linux-image-azure 5.11.0.1021.22~20.04.21
linux-image-gcp 5.11.0.1022.24~20.04.21
linux-image-generic-64k-hwe-20.04 5.11.0.40.44~20.04.18
linux-image-generic-hwe-20.04 5.11.0.40.44~20.04.18
linux-image-generic-lpae-hwe-20.04 5.11.0.40.44~20.04.18
linux-image-lowlatency-hwe-20.04 5.11.0.40.44~20.04.18
linux-image-oem-20.04c 5.13.0.1019.23
linux-image-oracle 5.11.0.1021.22~20.04.14
linux-image-virtual-hwe-20.04 5.11.0.40.44~20.04.18

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.

References:
https://ubuntu.com/security/notices/USN-5135-1
CVE-2021-3759

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.13.0-21.21
https://launchpad.net/ubuntu/+source/linux-aws/5.13.0-1006.7
https://launchpad.net/ubuntu/+source/linux-azure/5.13.0-1007.8
https://launchpad.net/ubuntu/+source/linux-gcp/5.13.0-1006.7
https://launchpad.net/ubuntu/+source/linux-kvm/5.13.0-1005.5
https://launchpad.net/ubuntu/+source/linux-oracle/5.13.0-1009.11
https://launchpad.net/ubuntu/+source/linux/5.11.0-40.44
https://launchpad.net/ubuntu/+source/linux-aws/5.11.0-1021.22
https://launchpad.net/ubuntu/+source/linux-azure/5.11.0-1021.22
https://launchpad.net/ubuntu/+source/linux-gcp/5.11.0-1022.24
https://launchpad.net/ubuntu/+source/linux-kvm/5.11.0-1019.21
https://launchpad.net/ubuntu/+source/linux-oracle/5.11.0-1021.22
https://launchpad.net/ubuntu/+source/linux-aws-5.11/5.11.0-1021.22~20.04.2
https://launchpad.net/ubuntu/+source/linux-azure-5.11/5.11.0-1021.22~20.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-5.11/5.11.0-1022.24~20.04.1
https://launchpad.net/ubuntu/+source/linux-hwe-5.11/5.11.0-40.44~20.04.2
https://launchpad.net/ubuntu/+source/linux-oem-5.13/5.13.0-1019.23
https://launchpad.net/ubuntu/+source/linux-oracle-5.11/5.11.0-1021.22~20.04.1
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