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
Source: USN-4041-1: Linux kernel update