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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:

Summary

Several security issues were fixed in the Linux kernel.

Software Description

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-aws5.0.0-1010.11
linux-image-5.0.0-1010-azure5.0.0-1010.10
linux-image-5.0.0-1010-gcp5.0.0-1010.10
linux-image-5.0.0-1010-kvm5.0.0-1010.11
linux-image-5.0.0-1012-raspi25.0.0-1012.12
linux-image-5.0.0-1016-snapdragon5.0.0-1016.17
linux-image-5.0.0-20-generic5.0.0-20.21
linux-image-5.0.0-20-generic-lpae5.0.0-20.21
linux-image-5.0.0-20-lowlatency5.0.0-20.21
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-gcp4.18.0-1015.16
linux-image-4.18.0-1016-kvm4.18.0-1016.17
linux-image-4.18.0-1018-raspi24.18.0-1018.21
linux-image-4.18.0-1020-aws4.18.0-1020.24
linux-image-4.18.0-1023-azure4.18.0-1023.24
linux-image-4.18.0-25-generic4.18.0-25.26
linux-image-4.18.0-25-generic-lpae4.18.0-25.26
linux-image-4.18.0-25-lowlatency4.18.0-25.26
linux-image-4.18.0-25-snapdragon4.18.0-25.26
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-oracle4.15.0-1017.19
linux-image-4.15.0-1036-gcp4.15.0-1036.38
linux-image-4.15.0-1036-gke4.15.0-1036.38
linux-image-4.15.0-1038-kvm4.15.0-1038.38
linux-image-4.15.0-1040-raspi24.15.0-1040.43
linux-image-4.15.0-1043-aws4.15.0-1043.45
linux-image-4.15.0-1045-oem4.15.0-1045.50
linux-image-4.15.0-1057-snapdragon4.15.0-1057.62
linux-image-4.15.0-54-generic4.15.0-54.58
linux-image-4.15.0-54-generic-lpae4.15.0-54.58
linux-image-4.15.0-54-lowlatency4.15.0-54.58
linux-image-4.18.0-1023-azure4.18.0-1023.24~18.04.1
linux-image-4.18.0-25-generic4.18.0-25.26~18.04.1
linux-image-4.18.0-25-generic-lpae4.18.0-25.26~18.04.1
linux-image-4.18.0-25-lowlatency4.18.0-25.26~18.04.1
linux-image-4.18.0-25-snapdragon4.18.0-25.26~18.04.1
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-oracle4.15.0-1017.19~16.04.2
linux-image-4.15.0-1036-gcp4.15.0-1036.38~16.04.1
linux-image-4.15.0-1043-aws4.15.0-1043.45~16.04.1
linux-image-4.15.0-1049-azure4.15.0-1049.54
linux-image-4.15.0-54-generic4.15.0-54.58~16.04.1
linux-image-4.15.0-54-generic-lpae4.15.0-54.58~16.04.1
linux-image-4.15.0-54-lowlatency4.15.0-54.58~16.04.1
linux-image-4.4.0-1051-kvm4.4.0-1051.58
linux-image-4.4.0-1087-aws4.4.0-1087.98
linux-image-4.4.0-1114-raspi24.4.0-1114.123
linux-image-4.4.0-1118-snapdragon4.4.0-1118.124
linux-image-4.4.0-154-generic4.4.0-154.181
linux-image-4.4.0-154-generic-lpae4.4.0-154.181
linux-image-4.4.0-154-lowlatency4.4.0-154.181
linux-image-4.4.0-154-powerpc-e500mc4.4.0-154.181
linux-image-4.4.0-154-powerpc-smp4.4.0-154.181
linux-image-4.4.0-154-powerpc64-emb4.4.0-154.181
linux-image-4.4.0-154-powerpc64-smp4.4.0-154.181
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

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