USN-4041-1: Linux kernel update
29 June 2019
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- 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-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems
- linux-hwe - Linux hardware enablement (HWE) kernel
- linux-kvm - Linux kernel for cloud environments
- linux-oem - Linux kernel for OEM processors
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-raspi2 - Linux kernel for Raspberry Pi 2
- linux-snapdragon - Linux kernel for Snapdragon processors
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
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linux-image-5.0.0-1010-aws
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5.0.0-1010.11
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linux-image-5.0.0-1010-azure
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5.0.0-1010.10
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linux-image-5.0.0-1010-gcp
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5.0.0-1010.10
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linux-image-5.0.0-1010-kvm
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5.0.0-1010.11
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linux-image-5.0.0-1012-raspi2
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5.0.0-1012.12
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linux-image-5.0.0-1016-snapdragon
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5.0.0-1016.17
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linux-image-5.0.0-20-generic
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5.0.0-20.21
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linux-image-5.0.0-20-generic-lpae
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5.0.0-20.21
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linux-image-5.0.0-20-lowlatency
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5.0.0-20.21
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linux-image-aws
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5.0.0.1010.10
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linux-image-azure
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5.0.0.1010.9
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linux-image-gcp
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5.0.0.1010.10
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linux-image-generic
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5.0.0.20.21
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linux-image-generic-lpae
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5.0.0.20.21
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linux-image-gke
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5.0.0.1010.10
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linux-image-kvm
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5.0.0.1010.10
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linux-image-lowlatency
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5.0.0.20.21
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linux-image-raspi2
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5.0.0.1012.9
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linux-image-snapdragon
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5.0.0.1016.9
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linux-image-virtual
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5.0.0.20.21
Ubuntu 18.10
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linux-image-4.18.0-1015-gcp
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4.18.0-1015.16
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linux-image-4.18.0-1016-kvm
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4.18.0-1016.17
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linux-image-4.18.0-1018-raspi2
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4.18.0-1018.21
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linux-image-4.18.0-1020-aws
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4.18.0-1020.24
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linux-image-4.18.0-1023-azure
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4.18.0-1023.24
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linux-image-4.18.0-25-generic
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4.18.0-25.26
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linux-image-4.18.0-25-generic-lpae
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4.18.0-25.26
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linux-image-4.18.0-25-lowlatency
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4.18.0-25.26
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linux-image-4.18.0-25-snapdragon
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4.18.0-25.26
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linux-image-aws
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4.18.0.1020.20
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linux-image-azure
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4.18.0.1023.25
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linux-image-gcp
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4.18.0.1015.15
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linux-image-generic
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4.18.0.25.26
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linux-image-generic-lpae
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4.18.0.25.26
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linux-image-gke
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4.18.0.1015.15
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linux-image-kvm
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4.18.0.1016.16
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linux-image-lowlatency
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4.18.0.25.26
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linux-image-powerpc-e500mc
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4.18.0.25.26
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linux-image-powerpc-smp
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4.18.0.25.26
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linux-image-powerpc64-emb
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4.18.0.25.26
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linux-image-powerpc64-smp
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4.18.0.25.26
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linux-image-raspi2
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4.18.0.1018.15
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linux-image-snapdragon
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4.18.0.25.26
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linux-image-virtual
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4.18.0.25.26
Ubuntu 18.04
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linux-image-4.15.0-1017-oracle
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4.15.0-1017.19
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linux-image-4.15.0-1036-gcp
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4.15.0-1036.38
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linux-image-4.15.0-1036-gke
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4.15.0-1036.38
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linux-image-4.15.0-1038-kvm
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4.15.0-1038.38
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linux-image-4.15.0-1040-raspi2
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4.15.0-1040.43
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linux-image-4.15.0-1043-aws
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4.15.0-1043.45
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linux-image-4.15.0-1045-oem
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4.15.0-1045.50
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linux-image-4.15.0-1057-snapdragon
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4.15.0-1057.62
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linux-image-4.15.0-54-generic
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4.15.0-54.58
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linux-image-4.15.0-54-generic-lpae
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4.15.0-54.58
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linux-image-4.15.0-54-lowlatency
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4.15.0-54.58
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linux-image-4.18.0-1023-azure
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4.18.0-1023.24~18.04.1
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linux-image-4.18.0-25-generic
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4.18.0-25.26~18.04.1
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linux-image-4.18.0-25-generic-lpae
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4.18.0-25.26~18.04.1
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linux-image-4.18.0-25-lowlatency
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4.18.0-25.26~18.04.1
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linux-image-4.18.0-25-snapdragon
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4.18.0-25.26~18.04.1
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linux-image-aws
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4.15.0.1043.42
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linux-image-azure
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4.18.0.1023.21
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linux-image-gcp
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4.15.0.1036.38
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linux-image-generic
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4.15.0.54.56
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linux-image-generic-hwe-18.04
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4.18.0.25.74
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linux-image-generic-lpae
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4.15.0.54.56
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linux-image-generic-lpae-hwe-18.04
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4.18.0.25.74
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linux-image-gke
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4.15.0.1036.39
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linux-image-gke-4.15
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4.15.0.1036.39
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linux-image-kvm
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4.15.0.1038.38
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linux-image-lowlatency
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4.15.0.54.56
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linux-image-lowlatency-hwe-18.04
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4.18.0.25.74
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linux-image-oem
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4.15.0.1045.49
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linux-image-oracle
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4.15.0.1017.20
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linux-image-raspi2
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4.15.0.1040.38
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linux-image-snapdragon
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4.15.0.1057.60
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linux-image-snapdragon-hwe-18.04
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4.18.0.25.74
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linux-image-virtual
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4.15.0.54.56
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linux-image-virtual-hwe-18.04
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4.18.0.25.74
Ubuntu 16.04
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linux-image-4.15.0-1017-oracle
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4.15.0-1017.19~16.04.2
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linux-image-4.15.0-1036-gcp
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4.15.0-1036.38~16.04.1
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linux-image-4.15.0-1043-aws
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4.15.0-1043.45~16.04.1
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linux-image-4.15.0-1049-azure
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4.15.0-1049.54
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linux-image-4.15.0-54-generic
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4.15.0-54.58~16.04.1
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linux-image-4.15.0-54-generic-lpae
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4.15.0-54.58~16.04.1
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linux-image-4.15.0-54-lowlatency
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4.15.0-54.58~16.04.1
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linux-image-4.4.0-1051-kvm
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4.4.0-1051.58
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linux-image-4.4.0-1087-aws
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4.4.0-1087.98
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linux-image-4.4.0-1114-raspi2
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4.4.0-1114.123
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linux-image-4.4.0-1118-snapdragon
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4.4.0-1118.124
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linux-image-4.4.0-154-generic
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4.4.0-154.181
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linux-image-4.4.0-154-generic-lpae
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4.4.0-154.181
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linux-image-4.4.0-154-lowlatency
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4.4.0-154.181
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linux-image-4.4.0-154-powerpc-e500mc
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4.4.0-154.181
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linux-image-4.4.0-154-powerpc-smp
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4.4.0-154.181
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linux-image-4.4.0-154-powerpc64-emb
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4.4.0-154.181
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linux-image-4.4.0-154-powerpc64-smp
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4.4.0-154.181
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linux-image-aws
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4.4.0.1087.90
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linux-image-aws-hwe
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4.15.0.1043.43
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linux-image-azure
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4.15.0.1049.52
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linux-image-gcp
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4.15.0.1036.50
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linux-image-generic
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4.4.0.154.162
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linux-image-generic-hwe-16.04
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4.15.0.54.75
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linux-image-generic-lpae
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4.4.0.154.162
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linux-image-generic-lpae-hwe-16.04
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4.15.0.54.75
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linux-image-gke
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4.15.0.1036.50
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linux-image-kvm
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4.4.0.1051.51
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linux-image-lowlatency
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4.4.0.154.162
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linux-image-lowlatency-hwe-16.04
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4.15.0.54.75
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linux-image-oem
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4.15.0.54.75
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linux-image-oracle
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4.15.0.1017.11
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linux-image-powerpc-e500mc
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4.4.0.154.162
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linux-image-powerpc-smp
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4.4.0.154.162
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linux-image-powerpc64-emb
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4.4.0.154.162
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linux-image-powerpc64-smp
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4.4.0.154.162
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linux-image-raspi2
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4.4.0.1114.114
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linux-image-snapdragon
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4.4.0.1118.110
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linux-image-virtual
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4.4.0.154.162
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linux-image-virtual-hwe-16.04
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4.15.0.54.75
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.
Related notices
- USN-4041-2: linux-azure, linux-image-aws, linux-image-powerpc-smp-lts-xenial, linux-aws, linux-image-4.15.0-1049-azure, linux-image-4.4.0-154-powerpc-smp, linux-image-4.4.0-154-generic-lpae, linux-image-generic-lts-xenial, linux-image-4.4.0-154-generic, linux-image-4.4.0-1048-aws, linux-image-4.4.0-154-powerpc64-emb, linux-image-powerpc-e500mc-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-lts-xenial, linux-image-4.4.0-154-lowlatency, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-154-powerpc64-smp, linux-image-azure, linux-image-virtual-lts-xenial, linux-image-4.4.0-154-powerpc-e500mc