USN-4017-1: Linux kernel vulnerabilities
17 June 2019
The system could be made to crash if it received specially crafted network traffic.
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-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
Jonathan Looney discovered that the TCP retransmission queue implementation
in the Linux kernel could be fragmented when handling certain TCP Selective
Acknowledgment (SACK) sequences. A remote attacker could use this to cause
a denial of service. (CVE-2019-11478)
Jonathan Looney discovered that an integer overflow existed in the Linux
kernel when handling TCP Selective Acknowledgments (SACKs). A remote
attacker could use this to cause a denial of service (system crash).
(CVE-2019-11477)
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-5.0.0-1008-aws
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5.0.0-1008.8
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linux-image-5.0.0-1008-gcp
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5.0.0-1008.8
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linux-image-5.0.0-1008-kvm
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5.0.0-1008.8
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linux-image-5.0.0-1010-raspi2
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5.0.0-1010.10
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linux-image-5.0.0-1014-snapdragon
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5.0.0-1014.14
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linux-image-5.0.0-17-generic
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5.0.0-17.18
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linux-image-5.0.0-17-generic-lpae
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5.0.0-17.18
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linux-image-5.0.0-17-lowlatency
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5.0.0-17.18
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linux-image-aws
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5.0.0.1008.8
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linux-image-gcp
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5.0.0.1008.8
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linux-image-generic
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5.0.0.17.18
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linux-image-generic-lpae
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5.0.0.17.18
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linux-image-gke
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5.0.0.1008.8
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linux-image-kvm
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5.0.0.1008.8
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linux-image-lowlatency
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5.0.0.17.18
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linux-image-raspi2
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5.0.0.1010.7
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linux-image-snapdragon
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5.0.0.1014.7
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linux-image-virtual
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5.0.0.17.18
Ubuntu 18.10
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linux-image-4.18.0-1013-gcp
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4.18.0-1013.14
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linux-image-4.18.0-1014-kvm
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4.18.0-1014.14
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linux-image-4.18.0-1016-raspi2
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4.18.0-1016.18
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linux-image-4.18.0-1018-aws
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4.18.0-1018.20
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linux-image-4.18.0-1020-azure
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4.18.0-1020.20
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linux-image-4.18.0-22-generic
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4.18.0-22.23
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linux-image-4.18.0-22-generic-lpae
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4.18.0-22.23
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linux-image-4.18.0-22-lowlatency
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4.18.0-22.23
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linux-image-4.18.0-22-snapdragon
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4.18.0-22.23
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linux-image-aws
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4.18.0.1018.18
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linux-image-azure
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4.18.0.1020.21
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linux-image-gcp
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4.18.0.1013.13
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linux-image-generic
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4.18.0.22.23
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linux-image-generic-lpae
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4.18.0.22.23
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linux-image-gke
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4.18.0.1013.13
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linux-image-kvm
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4.18.0.1014.14
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linux-image-lowlatency
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4.18.0.22.23
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linux-image-raspi2
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4.18.0.1016.13
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linux-image-snapdragon
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4.18.0.22.23
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linux-image-virtual
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4.18.0.22.23
Ubuntu 18.04
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linux-image-4.15.0-1015-oracle
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4.15.0-1015.17
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linux-image-4.15.0-1034-gcp
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4.15.0-1034.36
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linux-image-4.15.0-1036-kvm
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4.15.0-1036.36
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linux-image-4.15.0-1038-raspi2
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4.15.0-1038.40
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linux-image-4.15.0-1041-aws
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4.15.0-1041.43
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linux-image-4.15.0-1043-oem
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4.15.0-1043.48
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linux-image-4.15.0-1055-snapdragon
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4.15.0-1055.59
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linux-image-4.15.0-52-generic
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4.15.0-52.56
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linux-image-4.15.0-52-generic-lpae
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4.15.0-52.56
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linux-image-4.15.0-52-lowlatency
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4.15.0-52.56
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linux-image-4.18.0-1020-azure
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4.18.0-1020.20~18.04.1
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linux-image-4.18.0-22-generic
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4.18.0-22.23~18.04.1
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linux-image-4.18.0-22-generic-lpae
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4.18.0-22.23~18.04.1
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linux-image-4.18.0-22-lowlatency
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4.18.0-22.23~18.04.1
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linux-image-4.18.0-22-snapdragon
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4.18.0-22.23~18.04.1
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linux-image-aws
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4.15.0.1041.40
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linux-image-azure
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4.18.0.1020.19
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linux-image-gcp
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4.15.0.1034.36
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linux-image-generic
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4.15.0.52.54
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linux-image-generic-hwe-18.04
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4.18.0.22.72
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linux-image-generic-lpae
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4.15.0.52.54
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linux-image-generic-lpae-hwe-18.04
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4.18.0.22.72
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linux-image-kvm
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4.15.0.1036.36
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linux-image-lowlatency
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4.15.0.52.54
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linux-image-lowlatency-hwe-18.04
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4.18.0.22.72
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linux-image-oem
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4.15.0.1043.47
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linux-image-oracle
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4.15.0.1015.18
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linux-image-raspi2
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4.15.0.1038.36
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linux-image-snapdragon
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4.15.0.1055.58
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linux-image-snapdragon-hwe-18.04
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4.18.0.22.72
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linux-image-virtual
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4.15.0.52.54
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linux-image-virtual-hwe-18.04
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4.18.0.22.72
Ubuntu 16.04
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linux-image-4.15.0-1015-oracle
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4.15.0-1015.17~16.04.1
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linux-image-4.15.0-1034-gcp
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4.15.0-1034.36~16.04.1
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linux-image-4.15.0-1041-aws
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4.15.0-1041.43~16.04.1
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linux-image-4.15.0-1047-azure
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4.15.0-1047.51
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linux-image-4.15.0-52-generic
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4.15.0-52.56~16.04.1
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linux-image-4.15.0-52-generic-lpae
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4.15.0-52.56~16.04.1
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linux-image-4.15.0-52-lowlatency
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4.15.0-52.56~16.04.1
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linux-image-4.4.0-1048-kvm
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4.4.0-1048.55
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linux-image-4.4.0-1085-aws
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4.4.0-1085.96
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linux-image-4.4.0-1111-raspi2
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4.4.0-1111.120
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linux-image-4.4.0-1115-snapdragon
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4.4.0-1115.121
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linux-image-4.4.0-151-generic
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4.4.0-151.178
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linux-image-4.4.0-151-generic-lpae
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4.4.0-151.178
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linux-image-4.4.0-151-lowlatency
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4.4.0-151.178
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linux-image-4.4.0-151-powerpc-e500mc
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4.4.0-151.178
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linux-image-4.4.0-151-powerpc-smp
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4.4.0-151.178
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linux-image-4.4.0-151-powerpc64-emb
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4.4.0-151.178
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linux-image-4.4.0-151-powerpc64-smp
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4.4.0-151.178
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linux-image-aws
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4.4.0.1085.88
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linux-image-aws-hwe
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4.15.0.1041.41
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linux-image-azure
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4.15.0.1047.51
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linux-image-gcp
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4.15.0.1034.48
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linux-image-generic
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4.4.0.151.159
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linux-image-generic-hwe-16.04
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4.15.0.52.73
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linux-image-generic-lpae
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4.4.0.151.159
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linux-image-generic-lpae-hwe-16.04
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4.15.0.52.73
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linux-image-gke
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4.15.0.1034.48
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linux-image-kvm
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4.4.0.1048.48
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linux-image-lowlatency
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4.4.0.151.159
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linux-image-lowlatency-hwe-16.04
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4.15.0.52.73
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linux-image-oem
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4.15.0.52.73
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linux-image-oracle
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4.15.0.1015.9
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linux-image-powerpc-e500mc
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4.4.0.151.159
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linux-image-powerpc-smp
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4.4.0.151.159
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linux-image-powerpc64-emb
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4.4.0.151.159
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linux-image-powerpc64-smp
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4.4.0.151.159
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linux-image-raspi2
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4.4.0.1111.111
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linux-image-snapdragon
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4.4.0.1115.107
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linux-image-virtual
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4.4.0.151.159
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linux-image-virtual-hwe-16.04
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4.15.0.52.73
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.