USN-4526-1: Linux kernel vulnerabilities

Releases

• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

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-azure-4.15 - Linux kernel for Microsoft Azure Cloud systems
• linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
• linux-gcp-4.15 - 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 systems
• linux-oracle - Linux kernel for Oracle Cloud systems
• linux-raspi2 - Linux kernel for Raspberry Pi (V8) systems
• linux-snapdragon - Linux kernel for Qualcomm Snapdragon processors

Details

It was discovered that the AMD Cryptographic Coprocessor device driver in
the Linux kernel did not properly deallocate memory in some situations. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-18808)

It was discovered that the Conexant 23885 TV card device driver for the
Linux kernel did not properly deallocate memory in some error conditions. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-19054)

It was discovered that the ADIS16400 IIO IMU Driver for the Linux kernel
did not properly deallocate memory in certain error conditions. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2019-19061)

It was discovered that the AMD Audio Coprocessor driver for the Linux
kernel did not properly deallocate memory in certain error conditions. A
local attacker with the ability to load modules could use this to cause a
denial of service (memory exhaustion). (CVE-2019-19067)

It was discovered that the Atheros HTC based wireless driver in the Linux
kernel did not properly deallocate in certain error conditions. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2019-19073, CVE-2019-19074)

It was discovered that the F2FS file system in the Linux kernel did not
properly perform bounds checking in some situations, leading to an out-of-
bounds read. A local attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2019-9445)

It was discovered that the VFIO PCI driver in the Linux kernel did not
properly handle attempts to access disabled memory spaces. A local attacker
could use this to cause a denial of service (system crash).
(CVE-2020-12888)

It was discovered that the cgroup v2 subsystem in the Linux kernel did not
properly perform reference counting in some situations, leading to a NULL
pointer dereference. A local attacker could use this to cause a denial of
service or possibly gain administrative privileges. (CVE-2020-14356)

It was discovered that the state of network RNG in the Linux kernel was
potentially observable. A remote attacker could use this to expose
sensitive information. (CVE-2020-16166)

Update instructions

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

Ubuntu 18.04

• linux-image-4.15.0-1054-oracle - 4.15.0-1054.58
• linux-image-4.15.0-1070-gke - 4.15.0-1070.73
• linux-image-4.15.0-1071-raspi2 - 4.15.0-1071.75
• linux-image-4.15.0-1075-kvm - 4.15.0-1075.76
• linux-image-4.15.0-1083-aws - 4.15.0-1083.87
• linux-image-4.15.0-1084-gcp - 4.15.0-1084.95
• linux-image-4.15.0-1087-snapdragon - 4.15.0-1087.95
• linux-image-4.15.0-1096-azure - 4.15.0-1096.106
• linux-image-4.15.0-1097-oem - 4.15.0-1097.107
• linux-image-4.15.0-118-generic - 4.15.0-118.119
• linux-image-4.15.0-118-generic-lpae - 4.15.0-118.119
• linux-image-4.15.0-118-lowlatency - 4.15.0-118.119
• linux-image-aws-lts-18.04 - 4.15.0.1083.85
• linux-image-azure-lts-18.04 - 4.15.0.1096.69
• linux-image-gcp-lts-18.04 - 4.15.0.1084.102
• linux-image-generic - 4.15.0.118.105
• linux-image-generic-lpae - 4.15.0.118.105
• linux-image-gke - 4.15.0.1070.74
• linux-image-gke-4.15 - 4.15.0.1070.74
• linux-image-kvm - 4.15.0.1075.71
• linux-image-lowlatency - 4.15.0.118.105
• linux-image-oem - 4.15.0.1097.101
• linux-image-oracle-lts-18.04 - 4.15.0.1054.64
• linux-image-raspi2 - 4.15.0.1071.68
• linux-image-snapdragon - 4.15.0.1087.90
• linux-image-virtual - 4.15.0.118.105

Ubuntu 16.04

• linux-image-4.15.0-1054-oracle - 4.15.0-1054.58~16.04.1
• linux-image-4.15.0-1083-aws - 4.15.0-1083.87~16.04.1
• linux-image-4.15.0-1084-gcp - 4.15.0-1084.95~16.04.1
• linux-image-4.15.0-1096-azure - 4.15.0-1096.106~16.04.1
• linux-image-4.15.0-118-generic - 4.15.0-118.119~16.04.1
• linux-image-4.15.0-118-generic-lpae - 4.15.0-118.119~16.04.1
• linux-image-4.15.0-118-lowlatency - 4.15.0-118.119~16.04.1
• linux-image-aws-hwe - 4.15.0.1083.79
• linux-image-azure - 4.15.0.1096.90
• linux-image-azure-edge - 4.15.0.1096.90
• linux-image-gcp - 4.15.0.1084.85
• linux-image-generic-hwe-16.04 - 4.15.0.118.119
• linux-image-generic-lpae-hwe-16.04 - 4.15.0.118.119
• linux-image-gke - 4.15.0.1084.85
• linux-image-lowlatency-hwe-16.04 - 4.15.0.118.119
• linux-image-oem - 4.15.0.118.119
• linux-image-oracle - 4.15.0.1054.44
• linux-image-virtual-hwe-16.04 - 4.15.0.118.119

Ubuntu 14.04

• linux-image-4.15.0-1096-azure - 4.15.0-1096.106~14.04.1
• linux-image-azure - 4.15.0.1096.72

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-2019-18808
• CVE-2019-19054
• CVE-2019-19061
• CVE-2019-19067
• CVE-2019-19073
• CVE-2019-19074
• CVE-2019-9445
• CVE-2020-12888
• CVE-2020-14356
• CVE-2020-16166

Related notices

• USN-4525-1: linux-oracle, linux-image-5.4.0-48-generic, linux-image-generic-lpae-hwe-20.04, linux-image-5.4.0-1019-raspi, linux-image-oem, linux-azure, linux-image-raspi-hwe-18.04-edge, linux-image-raspi2-hwe-18.04-edge, linux-image-lowlatency, linux-image-virtual-hwe-20.04, linux-image-generic-lpae, linux-image-lowlatency-hwe-18.04, linux-image-raspi2-hwe-18.04, linux-image-virtual-hwe-18.04, linux-image-generic-lpae-hwe-18.04-edge, linux-image-aws-edge, linux-gcp-5.4, linux-image-azure-edge, linux-kvm, linux-image-raspi, linux-oracle-5.4, linux-image-virtual-hwe-18.04-edge, linux-image-azure, linux-image-lowlatency-hwe-18.04-edge, linux-aws, linux-image-generic-hwe-18.04-edge, linux-image-5.4.0-1026-azure, linux-raspi-5.4, linux-image-generic, linux-image-5.4.0-48-lowlatency, linux-image-oracle, linux-image-oracle-edge, linux-aws-5.4, linux-image-5.4.0-1024-kvm, linux-image-snapdragon-hwe-18.04, linux-image-5.4.0-1025-oracle, linux-image-gcp, linux-image-oem-osp1, linux-image-aws, linux-image-raspi-hwe-18.04, linux-image-generic-lpae-hwe-18.04, linux-image-virtual, linux-image-kvm, linux-hwe-5.4, linux-image-generic-hwe-20.04, linux-image-5.4.0-1025-gcp, linux-image-snapdragon-hwe-18.04-edge, linux-image-raspi2, linux-gcp, linux-azure-5.4, linux, linux-image-lowlatency-hwe-20.04, linux-image-5.4.0-1025-aws, linux-image-gke, linux-raspi, linux-image-generic-hwe-18.04, linux-image-5.4.0-48-generic-lpae, linux-image-gcp-edge
• USN-4527-1: linux-image-lowlatency-lts-wily, linux-image-4.4.0-1080-kvm, linux-image-virtual-lts-utopic, linux-raspi2, linux-image-4.4.0-1114-aws, linux-image-4.4.0-190-generic-lpae, linux-image-lowlatency-lts-xenial, linux-image-lowlatency, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc-smp, linux-image-generic-lpae, linux-image-4.4.0-1143-snapdragon, linux-image-generic-lpae-lts-utopic, linux-image-generic-lpae-lts-xenial, linux-image-powerpc-smp-lts-utopic, linux-image-virtual-lts-xenial, linux-kvm, linux-image-4.4.0-190-powerpc64-emb, linux-aws, linux-image-powerpc64-smp-lts-vivid, linux-image-4.4.0-190-powerpc64-smp, linux-image-virtual-lts-vivid, linux-image-generic-lts-xenial, linux-image-4.4.0-1078-aws, linux-image-powerpc64-smp, linux-image-4.4.0-190-generic, linux-image-generic-lpae-lts-wily, linux-image-powerpc64-emb-lts-vivid, linux-image-generic, linux-image-generic-lts-vivid, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc64-emb-lts-utopic, linux-image-virtual-lts-wily, linux-image-snapdragon, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lts-wily, linux-image-4.4.0-190-powerpc-e500mc, linux-lts-xenial, linux-image-aws, linux-image-4.4.0-1139-raspi2, linux-image-lowlatency-lts-vivid, linux-image-powerpc-e500mc, linux-image-powerpc64-smp-lts-wily, linux-image-powerpc64-smp-lts-xenial, linux-image-virtual, linux-image-kvm, linux-image-powerpc64-emb, linux-image-powerpc64-emb-lts-wily, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-190-lowlatency, linux-image-generic-lpae-lts-vivid, linux-image-lowlatency-lts-utopic, linux-image-4.4.0-190-powerpc-smp, linux-image-raspi2, linux-image-powerpc64-smp-lts-utopic, linux-image-generic-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux, linux-image-powerpc-smp-lts-wily, linux-snapdragon, linux-image-powerpc-smp-lts-xenial
• USN-4208-1: linux-oracle, linux-image-5.3.0-24-generic-lpae, linux-image-lowlatency, linux-image-generic-lpae, linux-image-5.3.0-1009-gcp, linux-kvm, linux-aws, linux-image-5.3.0-1008-aws, linux-gcp-5.3, linux-image-5.3.0-24-snapdragon, linux-image-generic, linux-image-oracle, linux-image-snapdragon, linux-image-gcp, linux-image-aws, linux-image-5.3.0-24-lowlatency, linux-image-virtual, linux-image-kvm, linux-image-5.3.0-1008-kvm, linux-image-5.3.0-24-generic, linux-gcp, linux, linux-image-5.3.0-1007-oracle, linux-image-gke, linux-image-gcp-edge
• USN-4904-1: linux-image-lowlatency-lts-wily, linux-image-virtual-lts-utopic, linux-raspi2, linux-image-4.4.0-208-powerpc64-emb, linux-image-4.4.0-208-powerpc64-smp, linux-image-lowlatency, linux-image-lowlatency-lts-xenial, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc-smp, linux-image-generic-lpae, linux-image-4.4.0-208-powerpc-smp, linux-image-generic-lpae-lts-utopic, linux-image-4.4.0-1090-aws, linux-image-4.4.0-1091-kvm, linux-image-generic-lpae-lts-xenial, linux-image-powerpc-smp-lts-utopic, linux-image-virtual-lts-xenial, linux-kvm, linux-aws, linux-image-powerpc64-smp-lts-vivid, linux-image-4.4.0-208-generic-lpae, linux-image-virtual-lts-vivid, linux-image-generic-lts-xenial, linux-image-powerpc64-smp, linux-image-generic-lpae-lts-wily, linux-image-powerpc64-emb-lts-vivid, linux-image-generic, linux-image-generic-lts-vivid, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc64-emb-lts-utopic, linux-image-virtual-lts-wily, linux-image-snapdragon, linux-image-4.4.0-1126-aws, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lts-wily, linux-image-4.4.0-1154-snapdragon, linux-lts-xenial, linux-image-aws, linux-image-lowlatency-lts-vivid, linux-image-powerpc-e500mc, linux-image-powerpc64-smp-lts-wily, linux-image-powerpc64-smp-lts-xenial, linux-image-virtual, linux-image-kvm, linux-image-powerpc64-emb, linux-image-powerpc64-emb-lts-wily, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic-lpae-lts-vivid, linux-image-lowlatency-lts-utopic, linux-image-raspi2, linux-image-4.4.0-208-lowlatency, linux-image-4.4.0-1150-raspi2, linux-image-generic-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux, linux-image-powerpc-smp-lts-wily, linux-image-powerpc64-smp-lts-utopic, linux-snapdragon, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-208-generic, linux-image-4.4.0-208-powerpc-e500mc
• USN-4226-1: linux-aws-5.0, linux-image-5.0.0-38-generic-lpae, linux-oracle, linux-raspi2, linux-gke-5.0, linux-azure, linux-image-gke-5.0, linux-image-lowlatency, linux-image-5.0.0-1024-kvm, linux-image-generic-lpae, linux-oem-osp1, linux-oracle-5.0, linux-image-aws-edge, linux-kvm, linux-image-5.0.0-1009-oracle, linux-image-5.0.0-38-lowlatency, linux-image-azure, linux-aws, linux-image-5.0.0-1033-oem-osp1, linux-image-5.0.0-1027-gke, linux-image-5.0.0-1028-gcp, linux-image-5.0.0-38-generic, linux-image-generic, linux-image-oracle, linux-image-oracle-edge, linux-image-gcp, linux-image-oem-osp1, linux-image-5.0.0-1028-azure, linux-image-aws, linux-image-virtual, linux-image-kvm, linux-image-raspi2, linux-gcp, linux-image-5.0.0-1024-raspi2, linux, linux-image-5.0.0-1023-aws, linux-image-gke
• USN-5361-1: linux-signed-lowlatency, linux-lowlatency-lts-utopic, linux-modules-4.4.0-1103-aws, linux-tools-virtual-lts-wily, linux-image-extra-virtual-lts-wily, linux-source-4.4.0, linux-virtual, linux-signed-image-generic-lts-utopic, linux-cloud-tools-virtual-lts-wily, linux-modules-4.4.0-1104-kvm, linux-headers-generic-lts-vivid, linux-kvm, linux-tools-4.4.0-1139-aws, linux-modules-extra-4.4.0-1139-aws, linux-modules-4.4.0-1139-aws, linux-lowlatency-lts-wily, linux-signed-generic-lts-wily, linux-tools-lowlatency-lts-utopic, linux-image-virtual-lts-vivid, linux-buildinfo-4.4.0-1104-kvm, linux-headers-kvm, linux-signed-image-lowlatency, linux-tools-lowlatency-lts-wily, linux-generic-lts-vivid, linux-image-virtual-lts-wily, linux-tools-generic-lts-utopic, linux-modules-extra-4.4.0-223-generic, linux-cloud-tools-lowlatency, linux-image-generic-lts-wily, linux-headers-4.4.0-223, linux-doc, linux-headers-generic, linux-aws-cloud-tools-4.4.0-1139, linux-cloud-tools-common, linux-cloud-tools-lowlatency-lts-vivid, linux-image-virtual, linux-buildinfo-4.4.0-223-lowlatency, linux-signed-image-generic-lts-xenial, linux-generic, linux-image-hwe-generic-trusty, linux-lowlatency-lts-xenial, linux-headers-generic-lts-utopic, linux-tools-virtual-lts-utopic, linux-libc-dev, linux-kvm-cloud-tools-4.4.0-1104, linux-buildinfo-4.4.0-1139-aws, linux-aws-headers-4.4.0-1103, linux-image-virtual-lts-utopic, linux-hwe-generic-trusty, linux-generic-lts-utopic, linux-buildinfo-4.4.0-223-generic, linux-kvm-headers-4.4.0-1104, linux-aws-tools-4.4.0-1103, linux-image-4.4.0-1139-aws, linux-signed-generic-lts-vivid, linux-image-virtual-lts-xenial, linux-headers-aws, linux-tools-common, linux-tools-lts-utopic, linux-signed-generic, linux-signed-generic-lts-xenial, linux-headers-4.4.0-1139-aws, linux-aws-headers-4.4.0-1139, linux-signed-generic-lts-utopic, linux-tools-generic-lts-wily, linux-image-4.4.0-223-generic, linux-cloud-tools-4.4.0-1104-kvm, linux-cloud-tools-lowlatency-lts-utopic, linux-image-extra-virtual-lts-utopic, linux-modules-4.4.0-223-lowlatency, linux-cloud-tools-generic, linux-image-unsigned-4.4.0-223-lowlatency, linux-lts-xenial-cloud-tools-4.4.0-223, linux-tools-generic-lts-vivid, linux-aws-tools-4.4.0-1139, linux-image-hwe-virtual-trusty, linux-lowlatency, linux-buildinfo-4.4.0-1103-aws, linux-signed-image-generic-lts-wily, linux-headers-generic-lts-xenial, linux-image-extra-virtual-lts-xenial, linux-image-kvm, linux-cloud-tools-virtual, linux-kvm-tools-4.4.0-1104, linux-tools-host, linux-hwe-virtual-trusty, linux-headers-generic-lts-wily, linux-headers-4.4.0-1104-kvm, linux-cloud-tools-virtual-lts-vivid, linux-signed-image-generic-lts-vivid, linux-virtual-lts-wily, linux-source, linux-modules-extra-aws, linux-cloud-tools-4.4.0-1139-aws, linux-cloud-tools-4.4.0-223, linux-image-lowlatency, linux-tools-lowlatency, linux-headers-4.4.0-223-lowlatency, linux-cloud-tools-lowlatency-lts-wily, linux-cloud-tools-virtual-lts-xenial, linux-image-generic-lts-xenial, linux-tools-lowlatency-lts-vivid, linux-tools-4.4.0-223, linux-headers-virtual-lts-xenial, linux-image-4.4.0-1103-aws, linux-image-generic, linux-image-generic-lts-vivid, linux-aws-cloud-tools-4.4.0-1103, linux-cloud-tools-generic-lts-vivid, linux-virtual-lts-utopic, linux-signed-image-generic, linux-headers-lowlatency, linux-tools-virtual-lts-vivid, linux-image-aws, linux-image-lowlatency-lts-vivid, linux-headers-virtual, linux-image-extra-virtual-lts-vivid, linux-virtual-lts-vivid, linux-image-extra-virtual, linux-cloud-tools-generic-lts-utopic, linux-headers-virtual-lts-vivid, linux-headers-4.4.0-223-generic, linux-tools-4.4.0-1103-aws, linux-tools-virtual-lts-xenial, linux-tools-4.4.0-223-lowlatency, linux-headers-lowlatency-lts-vivid, linux-lowlatency-lts-vivid, linux-generic-lts-wily, linux-image-lowlatency-lts-wily, linux-cloud-tools-4.4.0-223-lowlatency, linux-crashdump, linux-cloud-tools-lowlatency-lts-xenial, linux-generic-lts-xenial, linux-image-lowlatency-lts-xenial, linux-signed-image-lowlatency-lts-wily, linux-tools-4.4.0-223-generic, linux-cloud-tools-generic-lts-xenial, linux-tools-4.4.0-1104-kvm, linux-headers-virtual-lts-utopic, linux-aws, linux-signed-lowlatency-lts-wily, linux-signed-lowlatency-lts-xenial, linux-image-4.4.0-223-lowlatency, linux-image-4.4.0-1104-kvm, linux-tools-lowlatency-lts-xenial, linux-tools-generic, linux-cloud-tools-4.4.0-223-generic, linux-tools-kvm, linux-tools-aws, linux-tools-virtual, linux-headers-4.4.0-1103-aws, linux-headers-lowlatency-lts-utopic, linux-cloud-tools-virtual-lts-utopic, linux-lts-xenial, linux-cloud-tools-4.4.0-1103-aws, linux-lts-xenial-tools-4.4.0-223, linux-image-unsigned-4.4.0-223-generic, linux-modules-4.4.0-223-generic, linux-image-lowlatency-lts-utopic, linux-signed-image-lowlatency-lts-xenial, linux-cloud-tools-generic-lts-wily, linux-headers-lowlatency-lts-xenial, linux-headers-virtual-lts-wily, linux-image-generic-lts-utopic, linux, linux-headers-lowlatency-lts-wily, linux-virtual-lts-xenial, linux-tools-generic-lts-xenial
• USN-4483-1: linux-oracle, linux-image-generic-lpae-hwe-20.04, linux-image-oem, linux-image-raspi-hwe-18.04-edge, linux-azure, linux-image-gkeop-5.4, linux-image-raspi2-hwe-18.04-edge, linux-image-5.4.0-45-lowlatency, linux-image-lowlatency, linux-image-virtual-hwe-20.04, linux-image-generic-lpae, linux-image-lowlatency-hwe-18.04, linux-image-raspi2-hwe-18.04, linux-image-virtual-hwe-18.04, linux-image-generic-lpae-hwe-18.04-edge, linux-image-aws-edge, linux-gcp-5.4, linux-image-azure-edge, linux-kvm, linux-image-raspi, linux-oracle-5.4, linux-image-virtual-hwe-18.04-edge, linux-image-azure, linux-aws, linux-image-generic-hwe-18.04-edge, linux-raspi-5.4, linux-image-gke-5.4, linux-image-generic, linux-image-oracle, linux-image-oracle-edge, linux-aws-5.4, linux-image-snapdragon-hwe-18.04, linux-image-gcp, linux-image-oem-osp1, linux-image-5.4.0-1022-gcp, linux-image-5.4.0-1023-azure, linux-image-5.4.0-45-generic-lpae, linux-image-aws, linux-image-raspi-hwe-18.04, linux-image-generic-lpae-hwe-18.04, linux-image-virtual, linux-image-5.4.0-1016-raspi, linux-image-kvm, linux-hwe-5.4, linux-image-5.4.0-1022-aws, linux-image-generic-hwe-20.04, linux-image-snapdragon-hwe-18.04-edge, linux-image-raspi2, linux-gcp, linux-azure-5.4, linux, linux-image-5.4.0-1022-oracle, linux-image-lowlatency-hwe-20.04, linux-image-gke, linux-raspi, linux-image-5.4.0-45-generic, linux-image-generic-hwe-18.04, linux-image-lowlatency-hwe-18.04-edge, linux-image-gcp-edge
• USN-4484-1: linux-image-5.3.0-1034-gke, linux-image-5.3.0-66-lowlatency, linux-image-gke-5.3, linux-image-5.3.0-66-generic, linux-raspi2-5.3, linux-image-5.3.0-1034-aws, linux-image-gkeop-5.3, linux-aws-5.3, linux-gke-5.3, linux-hwe, linux-image-5.3.0-1032-raspi2, linux-image-raspi2-hwe-18.04, linux-image-aws