USN-4302-1: 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-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

Paulo Bonzini discovered that the KVM hypervisor implementation in the
Linux kernel could improperly let a nested (level 2) guest access the
resources of a parent (level 1) guest in certain situations. An attacker
could use this to expose sensitive information. (CVE-2020-2732)

Gregory Herrero discovered that the fix for CVE-2019-14615 to address the
Linux kernel not properly clearing data structures on context switches for
certain Intel graphics processors was incomplete. A local attacker could
use this to expose sensitive information. (CVE-2020-8832)

It was discovered that the IPMI message handler implementation in the Linux
kernel did not properly deallocate memory in certain situations. A local
attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2019-19046)

It was discovered that the Intel WiMAX 2400 driver in the Linux kernel did
not properly deallocate memory in certain situations. A local attacker
could use this to cause a denial of service (kernel memory exhaustion).
(CVE-2019-19051)

It was discovered that the Marvell Wi-Fi device driver in the Linux kernel
did not properly deallocate memory in certain error conditions. A local
attacker could use this to possibly cause a denial of service (kernel
memory exhaustion). (CVE-2019-19056)

It was discovered that the Intel(R) Wi-Fi device driver in the Linux kernel
device driver in the Linux kernel did not properly deallocate memory in
certain error conditions. A local attacker could possibly use this to cause
a denial of service (kernel memory exhaustion). (CVE-2019-19058)

It was discovered that the Brocade BFA Fibre Channel device driver in the
Linux kernel did not properly deallocate memory in certain error
conditions. A local attacker could possibly use this to cause a denial of
service (kernel memory exhaustion). (CVE-2019-19066)

It was discovered that the Realtek RTL8xxx USB Wi-Fi device driver in the
Linux kernel did not properly deallocate memory in certain error
conditions. A local attacker could possibly use this to cause a denial of
service (kernel memory exhaustion). (CVE-2019-19068)

It was discovered that ZR364XX Camera USB device driver for the Linux
kernel did not properly initialize memory. A physically proximate attacker
could use this to cause a denial of service (system crash).
(CVE-2019-15217)

Update instructions

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

Ubuntu 18.04

• linux-image-4.15.0-1035-oracle - 4.15.0-1035.39
• linux-image-4.15.0-1055-gke - 4.15.0-1055.58
• linux-image-4.15.0-1056-kvm - 4.15.0-1056.57
• linux-image-4.15.0-1057-raspi2 - 4.15.0-1057.61
• linux-image-4.15.0-1063-aws - 4.15.0-1063.67
• linux-image-4.15.0-1074-snapdragon - 4.15.0-1074.81
• linux-image-4.15.0-1076-oem - 4.15.0-1076.86
• linux-image-4.15.0-91-generic - 4.15.0-91.92
• linux-image-4.15.0-91-generic-lpae - 4.15.0-91.92
• linux-image-4.15.0-91-lowlatency - 4.15.0-91.92
• linux-image-aws - 4.15.0.1063.64
• linux-image-aws-lts-18.04 - 4.15.0.1063.64
• linux-image-generic - 4.15.0.91.83
• linux-image-generic-lpae - 4.15.0.91.83
• linux-image-gke - 4.15.0.1055.59
• linux-image-gke-4.15 - 4.15.0.1055.59
• linux-image-kvm - 4.15.0.1056.56
• linux-image-lowlatency - 4.15.0.91.83
• linux-image-oem - 4.15.0.1076.80
• linux-image-oracle-lts-18.04 - 4.15.0.1035.43
• linux-image-raspi2 - 4.15.0.1057.55
• linux-image-snapdragon - 4.15.0.1074.77
• linux-image-virtual - 4.15.0.91.83

Ubuntu 16.04

• linux-image-4.15.0-1035-oracle - 4.15.0-1035.38~16.04.1
• linux-image-4.15.0-1058-gcp - 4.15.0-1058.62
• linux-image-4.15.0-1063-aws - 4.15.0-1063.67~16.04.1
• linux-image-4.15.0-1075-azure - 4.15.0-1075.80
• linux-image-4.15.0-91-generic - 4.15.0-91.92~16.04.1
• linux-image-4.15.0-91-generic-lpae - 4.15.0-91.92~16.04.1
• linux-image-4.15.0-91-lowlatency - 4.15.0-91.92~16.04.1
• linux-image-aws-hwe - 4.15.0.1063.63
• linux-image-azure - 4.15.0.1075.78
• linux-image-gcp - 4.15.0.1058.72
• linux-image-generic-hwe-16.04 - 4.15.0.91.101
• linux-image-generic-lpae-hwe-16.04 - 4.15.0.91.101
• linux-image-gke - 4.15.0.1058.72
• linux-image-lowlatency-hwe-16.04 - 4.15.0.91.101
• linux-image-oem - 4.15.0.91.101
• linux-image-oracle - 4.15.0.1035.28
• linux-image-virtual-hwe-16.04 - 4.15.0.91.101

Ubuntu 14.04

• linux-image-4.15.0-1074-azure - 4.15.0-1074.79~14.04.1
• linux-image-azure - 4.15.0.1074.60

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-2019-15217
• CVE-2019-19046
• CVE-2019-19051
• CVE-2019-19056
• CVE-2019-19058
• CVE-2019-19066
• CVE-2019-19068
• CVE-2020-2732
• CVE-2020-8832

Related notices

• USN-4147-1: linux-image-5.0.0-1019-raspi2, linux-image-gke, linux-image-5.0.0-31-lowlatency, linux-image-5.0.0-1019-kvm, linux-image-5.0.0-31-generic, linux-azure, linux-image-snapdragon, linux-image-snapdragon-hwe-18.04, linux-image-generic-hwe-18.04, linux-image-raspi2, linux-image-lowlatency-hwe-18.04, linux-snapdragon, linux-image-5.0.0-31-generic-lpae, linux-aws, linux-image-generic, linux-hwe, linux-image-5.0.0-1022-azure, linux-image-aws, linux-image-gcp, linux-gcp, linux-image-virtual-hwe-18.04, linux-image-5.0.0-1023-snapdragon, linux, linux-raspi2, linux-gke-5.0, linux-image-5.0.0-1018-aws, linux-image-kvm, linux-image-azure, linux-image-5.0.0-1020-gcp, linux-image-generic-lpae-hwe-18.04, linux-image-lowlatency, linux-image-virtual, linux-image-gke-5.0, linux-image-generic-lpae, linux-image-5.0.0-1020-gke, linux-kvm
• USN-4286-1: linux-image-generic-lts-utopic, linux-image-4.4.0-1066-kvm, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc-smp-lts-wily, linux-image-generic-lpae-lts-wily, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual-lts-xenial, linux-image-snapdragon, linux-image-4.4.0-1129-raspi2, linux-image-generic-lts-vivid, linux-image-powerpc-smp-lts-utopic, linux-image-powerpc-e500mc-lts-wily, linux-image-4.4.0-1133-snapdragon, linux-image-powerpc-e500mc-lts-vivid, linux-image-raspi2, linux-snapdragon, linux-image-generic-lts-xenial, linux-image-generic-lts-wily, linux-image-4.4.0-174-powerpc64-emb, linux-image-powerpc64-emb-lts-wily, linux-aws, linux-image-generic, linux-image-virtual-lts-utopic, linux-image-powerpc64-emb-lts-vivid, linux-image-powerpc64-emb, linux-image-virtual-lts-vivid, linux-image-4.4.0-174-powerpc-e500mc, linux-image-aws, linux-image-lowlatency-lts-vivid, linux, linux-image-powerpc-smp, linux-image-powerpc64-smp-lts-utopic, linux-image-4.4.0-174-powerpc-smp, linux-image-lowlatency-lts-wily, linux-image-powerpc64-smp-lts-xenial, linux-raspi2, linux-image-powerpc64-smp-lts-wily, linux-image-kvm, linux-image-generic-lpae-lts-vivid, linux-image-powerpc-smp-lts-vivid, linux-image-virtual-lts-wily, linux-image-generic-lpae-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-174-powerpc64-smp, linux-image-4.4.0-174-generic, linux-image-powerpc64-smp, linux-image-generic-lpae-lts-utopic, linux-image-4.4.0-174-lowlatency, linux-image-lowlatency-lts-xenial, linux-image-lowlatency-lts-utopic, linux-image-4.4.0-1102-aws, linux-image-4.4.0-174-generic-lpae, linux-image-lowlatency, linux-image-powerpc-e500mc, linux-image-powerpc64-emb-lts-utopic, linux-image-virtual, linux-image-powerpc64-smp-lts-vivid, linux-image-generic-lpae, linux-kvm
• USN-4286-2: linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual-lts-xenial, linux-image-generic-lts-xenial, linux-image-4.4.0-174-powerpc64-emb, linux-aws, linux-image-aws, linux-image-4.4.0-1062-aws, linux-image-4.4.0-174-powerpc-smp, linux-image-powerpc64-smp-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-174-powerpc64-smp, linux-image-4.4.0-174-generic, linux-lts-xenial, linux-image-4.4.0-174-lowlatency, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-174-generic-lpae, linux-image-4.4.0-174-powerpc-e500mc
• USN-4319-1: linux-image-generic-hwe-18.04-edge, linux-image-gke, linux-azure, linux-image-snapdragon, linux-image-generic-lpae, linux-image-snapdragon-hwe-18.04-edge, linux-image-snapdragon-hwe-18.04, linux-image-5.3.0-1022-raspi2, linux-image-lowlatency-hwe-18.04-edge, linux-image-generic-hwe-18.04, linux-image-5.3.0-1016-aws, linux-image-raspi2, linux-image-lowlatency-hwe-18.04, linux-gcp-5.3, linux-image-5.3.0-1017-gcp, linux-image-5.3.0-46-generic, linux-aws, linux-image-generic, linux-image-virtual-hwe-18.04-edge, linux-hwe, linux-image-aws, linux-image-gcp, linux-gcp, linux-image-virtual-hwe-18.04, linux, linux-oracle, linux-image-5.3.0-1015-kvm, linux-raspi2, linux-image-oracle-edge, linux-image-5.3.0-46-generic-lpae, linux-image-azure-edge, linux-image-5.3.0-1019-azure, linux-image-kvm, linux-image-azure, linux-image-raspi2-hwe-18.04, linux-image-5.3.0-46-snapdragon, linux-raspi2-5.3, linux-azure-5.3, linux-image-5.3.0-1014-oracle, linux-image-generic-lpae-hwe-18.04-edge, linux-oracle-5.3, linux-image-generic-lpae-hwe-18.04, linux-image-lowlatency, linux-image-virtual, linux-image-5.3.0-46-lowlatency, linux-image-oracle, linux-image-gcp-edge, linux-kvm
• USN-4325-1: linux-oracle-5.0, linux-image-5.0.0-1014-oracle, linux-image-5.0.0-1034-gcp, linux-image-5.0.0-1033-gke, linux-oem-osp1, linux-gke-5.0, linux-azure, linux-image-gke-5.0, linux-image-5.0.0-1036-azure, linux-image-azure, linux-image-oracle, linux-image-gcp, linux-gcp, linux-image-5.0.0-1047-oem-osp1, linux-image-oem-osp1
• USN-4344-1: linux-image-5.0.0-1035-gke, linux-gke-5.0, linux-oem-osp1, linux-image-gke-5.0, linux-image-5.0.0-1050-oem-osp1, linux-image-oem-osp1
• USN-4225-1: linux-image-5.3.0-1008-oracle, linux-image-5.3.0-26-generic, linux-image-gke, linux-azure, linux-image-snapdragon, linux-image-generic-lpae, linux-image-5.3.0-26-lowlatency, linux-image-5.3.0-1009-kvm, linux-image-raspi2, linux-gcp-5.3, linux-aws, linux-image-generic, linux-image-5.3.0-1011-gcp, linux-image-aws, linux-image-5.3.0-1015-raspi2, linux-image-gcp, linux-gcp, linux-image-5.3.0-1010-gcp, linux, linux-oracle, linux-image-5.3.0-1009-azure, linux-raspi2, linux-image-azure-edge, linux-image-kvm, linux-image-azure, linux-azure-5.3, linux-image-5.3.0-26-snapdragon, linux-image-lowlatency, linux-image-virtual, linux-image-5.3.0-26-generic-lpae, linux-image-5.3.0-1009-aws, linux-image-oracle, linux-image-gcp-edge, linux-kvm
• USN-4225-2: linux-image-generic-hwe-18.04-edge, linux-image-5.3.0-26-generic, linux-image-generic-lpae-hwe-18.04-edge, linux-image-lowlatency-hwe-18.04, linux-image-generic-lpae-hwe-18.04, linux-image-virtual-hwe-18.04-edge, linux-image-5.3.0-26-generic-lpae, linux-hwe, linux-image-snapdragon-hwe-18.04-edge, linux-image-snapdragon-hwe-18.04, linux-image-virtual-hwe-18.04, linux-image-5.3.0-26-lowlatency, linux-image-lowlatency-hwe-18.04-edge, linux-image-generic-hwe-18.04
• USN-4301-1: linux-oracle-5.0, linux-image-5.0.0-1043-oem-osp1, linux-oem-osp1, linux-gke-5.0, linux-image-5.0.0-1033-gcp, linux-image-aws-edge, linux-aws-5.0, linux-image-5.0.0-1032-gke, linux-image-5.0.0-1013-oracle, linux-azure, linux-image-gke-5.0, linux-image-azure, linux-image-oracle, linux-image-gcp, linux-gcp, linux-image-5.0.0-1027-aws, linux-image-oem-osp1, linux-image-5.0.0-1035-azure
• USN-4300-1: linux-image-generic-hwe-18.04-edge, linux-image-5.3.0-1016-azure, linux-image-5.3.0-42-generic-lpae, linux-image-gke, linux-azure, linux-image-snapdragon, linux-image-generic-lpae, linux-image-snapdragon-hwe-18.04-edge, linux-image-snapdragon-hwe-18.04, linux-image-lowlatency-hwe-18.04-edge, linux-image-generic-hwe-18.04, linux-image-5.3.0-1014-gcp, linux-image-raspi2, linux-image-lowlatency-hwe-18.04, linux-gcp-5.3, linux-image-5.3.0-42-snapdragon, linux-aws, linux-image-generic, linux-image-virtual-hwe-18.04-edge, linux-image-5.3.0-1014-gke, linux-hwe, linux-image-gke-5.3, linux-image-aws, linux-image-gcp, linux-gcp, linux-image-virtual-hwe-18.04, linux, linux-oracle, linux-image-5.3.0-42-generic, linux-raspi2, linux-gke-5.3, linux-image-azure-edge, linux-image-kvm, linux-image-azure, linux-image-raspi2-hwe-18.04, linux-raspi2-5.3, linux-azure-5.3, linux-image-5.3.0-1019-raspi2, linux-image-generic-lpae-hwe-18.04-edge, linux-image-5.3.0-1011-oracle, linux-image-generic-lpae-hwe-18.04, linux-image-lowlatency, linux-image-virtual, linux-image-5.3.0-1013-aws, linux-image-5.3.0-1012-kvm, linux-image-oracle, linux-image-gcp-edge, linux-image-5.3.0-42-lowlatency, linux-kvm
• USN-4303-1: linux-image-generic-lts-utopic, linux-image-4.4.0-176-generic, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc-smp-lts-wily, linux-image-generic-lpae-lts-wily, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual-lts-xenial, linux-image-4.4.0-176-lowlatency, linux-image-4.4.0-1068-kvm, linux-image-snapdragon, linux-image-generic-lts-vivid, linux-image-powerpc-smp-lts-utopic, linux-image-powerpc-e500mc-lts-wily, linux-image-4.4.0-176-generic-lpae, linux-image-powerpc-e500mc-lts-vivid, linux-image-4.4.0-1104-aws, linux-image-raspi2, linux-image-generic-lts-xenial, linux-image-generic-lts-wily, linux-image-powerpc64-emb-lts-wily, linux-image-virtual-lts-utopic, linux-aws, linux-image-generic, linux-image-virtual-lts-vivid, linux-image-powerpc64-emb-lts-vivid, linux-image-4.4.0-1130-raspi2, linux-image-powerpc64-emb, linux-image-aws, linux-image-lowlatency-lts-vivid, linux, linux-image-powerpc-smp, linux-image-powerpc64-smp-lts-utopic, linux-image-4.4.0-176-powerpc64-smp, linux-image-lowlatency-lts-wily, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-176-powerpc-smp, linux-image-powerpc64-smp-lts-wily, linux-image-kvm, linux-image-4.4.0-176-powerpc-e500mc, linux-image-generic-lpae-lts-vivid, linux-image-powerpc-smp-lts-vivid, linux-image-virtual-lts-wily, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-1134-snapdragon, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc64-smp, linux-image-generic-lpae-lts-utopic, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-176-powerpc64-emb, linux-image-lowlatency-lts-utopic, linux-image-lowlatency, linux-image-powerpc-e500mc, linux-image-powerpc64-emb-lts-utopic, linux-image-virtual, linux-image-powerpc64-smp-lts-vivid, linux-image-generic-lpae, linux-kvm
• USN-4303-2: linux-image-4.4.0-176-generic, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual-lts-xenial, linux-image-4.4.0-176-lowlatency, linux-image-4.4.0-176-generic-lpae, linux-image-generic-lts-xenial, linux-aws, linux-image-aws, linux-image-4.4.0-1064-aws, linux-image-4.4.0-176-powerpc64-smp, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-176-powerpc-smp, linux-image-4.4.0-176-powerpc-e500mc, linux-image-generic-lpae-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-176-powerpc64-emb