USN-4041-1: Linux kernel update

USN-4041-1: Linux kernel update

linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon update

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 19.04
• Ubuntu 18.10
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

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-gcp – Linux kernel for Google Cloud Platform (GCP) systems
• linux-kvm – Linux kernel for cloud environments
• linux-raspi2 – Linux kernel for Raspberry Pi 2
• linux-snapdragon – Linux kernel for Snapdragon processors
• linux-gke-4.15 – Linux kernel for Google Container Engine (GKE) systems
• linux-hwe – Linux hardware enablement (HWE) kernel
• linux-oem – Linux kernel for OEM processors
• linux-oracle – Linux kernel for Oracle Cloud systems
• linux-aws-hwe – Linux kernel for Amazon Web Services (AWS-HWE) systems

Details

USN-4017-1 fixed vulnerabilities in the Linux kernel for Ubuntu.
Unfortunately, the update introduced a regression that interfered with
networking applications that setup very low SO_SNDBUF values. This
update fixes the problem.

We apologize for the inconvenience.

Jonathan Looney discovered that the Linux kernel could be coerced into
segmenting responses into multiple TCP segments. A remote attacker could
construct an ongoing sequence of requests to cause a denial of service.

Update instructions

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

Ubuntu 19.04

linux-image-5.0.0-1010-aws – 5.0.0-1010.11

linux-image-5.0.0-1010-azure – 5.0.0-1010.10

linux-image-5.0.0-1010-gcp – 5.0.0-1010.10

linux-image-5.0.0-1010-kvm – 5.0.0-1010.11

linux-image-5.0.0-1012-raspi2 – 5.0.0-1012.12

linux-image-5.0.0-1016-snapdragon – 5.0.0-1016.17

linux-image-5.0.0-20-generic – 5.0.0-20.21

linux-image-5.0.0-20-generic-lpae – 5.0.0-20.21

linux-image-5.0.0-20-lowlatency – 5.0.0-20.21

linux-image-aws – 5.0.0.1010.10

linux-image-azure – 5.0.0.1010.9

linux-image-gcp – 5.0.0.1010.10

linux-image-generic – 5.0.0.20.21

linux-image-generic-lpae – 5.0.0.20.21

linux-image-gke – 5.0.0.1010.10

linux-image-kvm – 5.0.0.1010.10

linux-image-lowlatency – 5.0.0.20.21

linux-image-raspi2 – 5.0.0.1012.9

linux-image-snapdragon – 5.0.0.1016.9

linux-image-virtual – 5.0.0.20.21

Ubuntu 18.10

linux-image-4.18.0-1015-gcp – 4.18.0-1015.16

linux-image-4.18.0-1016-kvm – 4.18.0-1016.17

linux-image-4.18.0-1018-raspi2 – 4.18.0-1018.21

linux-image-4.18.0-1020-aws – 4.18.0-1020.24

linux-image-4.18.0-1023-azure – 4.18.0-1023.24

linux-image-4.18.0-25-generic – 4.18.0-25.26

linux-image-4.18.0-25-generic-lpae – 4.18.0-25.26

linux-image-4.18.0-25-lowlatency – 4.18.0-25.26

linux-image-4.18.0-25-snapdragon – 4.18.0-25.26

linux-image-aws – 4.18.0.1020.20

linux-image-azure – 4.18.0.1023.25

linux-image-gcp – 4.18.0.1015.15

linux-image-generic – 4.18.0.25.26

linux-image-generic-lpae – 4.18.0.25.26

linux-image-gke – 4.18.0.1015.15

linux-image-kvm – 4.18.0.1016.16

linux-image-lowlatency – 4.18.0.25.26

linux-image-powerpc-e500mc – 4.18.0.25.26

linux-image-powerpc-smp – 4.18.0.25.26

linux-image-powerpc64-emb – 4.18.0.25.26

linux-image-powerpc64-smp – 4.18.0.25.26

linux-image-raspi2 – 4.18.0.1018.15

linux-image-snapdragon – 4.18.0.25.26

linux-image-virtual – 4.18.0.25.26

Ubuntu 18.04 LTS

linux-image-4.15.0-1017-oracle – 4.15.0-1017.19

linux-image-4.15.0-1036-gcp – 4.15.0-1036.38

linux-image-4.15.0-1036-gke – 4.15.0-1036.38

linux-image-4.15.0-1038-kvm – 4.15.0-1038.38

linux-image-4.15.0-1040-raspi2 – 4.15.0-1040.43

linux-image-4.15.0-1043-aws – 4.15.0-1043.45

linux-image-4.15.0-1045-oem – 4.15.0-1045.50

linux-image-4.15.0-1057-snapdragon – 4.15.0-1057.62

linux-image-4.15.0-54-generic – 4.15.0-54.58

linux-image-4.15.0-54-generic-lpae – 4.15.0-54.58

linux-image-4.15.0-54-lowlatency – 4.15.0-54.58

linux-image-4.18.0-1023-azure – 4.18.0-1023.24~18.04.1

linux-image-4.18.0-25-generic – 4.18.0-25.26~18.04.1

linux-image-4.18.0-25-generic-lpae – 4.18.0-25.26~18.04.1

linux-image-4.18.0-25-lowlatency – 4.18.0-25.26~18.04.1

linux-image-4.18.0-25-snapdragon – 4.18.0-25.26~18.04.1

linux-image-aws – 4.15.0.1043.42

linux-image-azure – 4.18.0.1023.21

linux-image-gcp – 4.15.0.1036.38

linux-image-generic – 4.15.0.54.56

linux-image-generic-hwe-18.04 – 4.18.0.25.74

linux-image-generic-lpae – 4.15.0.54.56

linux-image-generic-lpae-hwe-18.04 – 4.18.0.25.74

linux-image-gke – 4.15.0.1036.39

linux-image-gke-4.15 – 4.15.0.1036.39

linux-image-kvm – 4.15.0.1038.38

linux-image-lowlatency – 4.15.0.54.56

linux-image-lowlatency-hwe-18.04 – 4.18.0.25.74

linux-image-oem – 4.15.0.1045.49

linux-image-oracle – 4.15.0.1017.20

linux-image-powerpc-e500mc – 4.15.0.54.56

linux-image-powerpc-smp – 4.15.0.54.56

linux-image-powerpc64-emb – 4.15.0.54.56

linux-image-powerpc64-smp – 4.15.0.54.56

linux-image-raspi2 – 4.15.0.1040.38

linux-image-snapdragon – 4.15.0.1057.60

linux-image-snapdragon-hwe-18.04 – 4.18.0.25.74

linux-image-virtual – 4.15.0.54.56

linux-image-virtual-hwe-18.04 – 4.18.0.25.74

Ubuntu 16.04 LTS

linux-image-4.15.0-1017-oracle – 4.15.0-1017.19~16.04.2

linux-image-4.15.0-1036-gcp – 4.15.0-1036.38~16.04.1

linux-image-4.15.0-1043-aws – 4.15.0-1043.45~16.04.1

linux-image-4.15.0-1049-azure – 4.15.0-1049.54

linux-image-4.15.0-54-generic – 4.15.0-54.58~16.04.1

linux-image-4.15.0-54-generic-lpae – 4.15.0-54.58~16.04.1

linux-image-4.15.0-54-lowlatency – 4.15.0-54.58~16.04.1

linux-image-4.4.0-1051-kvm – 4.4.0-1051.58

linux-image-4.4.0-1087-aws – 4.4.0-1087.98

linux-image-4.4.0-1114-raspi2 – 4.4.0-1114.123

linux-image-4.4.0-1118-snapdragon – 4.4.0-1118.124

linux-image-4.4.0-154-generic – 4.4.0-154.181

linux-image-4.4.0-154-generic-lpae – 4.4.0-154.181

linux-image-4.4.0-154-lowlatency – 4.4.0-154.181

linux-image-4.4.0-154-powerpc-e500mc – 4.4.0-154.181

linux-image-4.4.0-154-powerpc-smp – 4.4.0-154.181

linux-image-4.4.0-154-powerpc64-emb – 4.4.0-154.181

linux-image-4.4.0-154-powerpc64-smp – 4.4.0-154.181

linux-image-aws – 4.4.0.1087.90

linux-image-aws-hwe – 4.15.0.1043.43

linux-image-azure – 4.15.0.1049.52

linux-image-gcp – 4.15.0.1036.50

linux-image-generic – 4.4.0.154.162

linux-image-generic-hwe-16.04 – 4.15.0.54.75

linux-image-generic-lpae – 4.4.0.154.162

linux-image-generic-lpae-hwe-16.04 – 4.15.0.54.75

linux-image-gke – 4.15.0.1036.50

linux-image-kvm – 4.4.0.1051.51

linux-image-lowlatency – 4.4.0.154.162

linux-image-lowlatency-hwe-16.04 – 4.15.0.54.75

linux-image-oem – 4.15.0.54.75

linux-image-oracle – 4.15.0.1017.11

linux-image-powerpc-e500mc – 4.4.0.154.162

linux-image-powerpc-smp – 4.4.0.154.162

linux-image-powerpc64-emb – 4.4.0.154.162

linux-image-powerpc64-smp – 4.4.0.154.162

linux-image-raspi2 – 4.4.0.1114.114

linux-image-snapdragon – 4.4.0.1118.110

linux-image-virtual – 4.4.0.154.162

linux-image-virtual-hwe-16.04 – 4.15.0.54.75

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

• CVE-2019-11479
• https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic

Source: USN-4041-1: Linux kernel update