USN-4368-1: Linux kernel vulnerabilities

Releases

• Ubuntu 18.04 ESM

Packages

• linux-gke-5.0 - Linux kernel for Google Container Engine (GKE) systems
• linux-oem-osp1 - Linux kernel for OEM systems

Details

Tristan Madani discovered that the file locking implementation in the Linux
kernel contained a race condition. A local attacker could possibly use this
to cause a denial of service or expose sensitive information.
(CVE-2019-19769)

It was discovered that the Serial CAN interface driver in the Linux kernel
did not properly initialize data. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2020-11494)

It was discovered that the linux kernel did not properly validate certain
mount options to the tmpfs virtual memory file system. A local attacker
with the ability to specify mount options could use this to cause a denial
of service (system crash). (CVE-2020-11565)

It was discovered that the OV51x USB Camera device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2020-11608)

It was discovered that the STV06XX USB Camera device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2020-11609)

It was discovered that the Xirlink C-It USB Camera device driver in the
Linux kernel did not properly validate device metadata. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2020-11668)

David Gibson discovered that the Linux kernel on Power9 CPUs did not
properly save and restore Authority Mask registers state in some
situations. A local attacker in a guest VM could use this to cause a denial
of service (host system crash). (CVE-2020-11669)

It was discovered that the block layer in the Linux kernel contained a race
condition leading to a use-after-free vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2020-12657)

Update instructions

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

Ubuntu 18.04

• linux-image-5.0.0-1037-gke - 5.0.0-1037.38
• linux-image-5.0.0-1052-oem-osp1 - 5.0.0-1052.57
• linux-image-gke-5.0 - 5.0.0.1037.25
• linux-image-oem-osp1 - 5.0.0.1052.55

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-2019-19769
• CVE-2020-11494
• CVE-2020-11565
• CVE-2020-11608
• CVE-2020-11609
• CVE-2020-11668
• CVE-2020-11669
• CVE-2020-12657

Related notices

• USN-4369-1: linux-image-5.3.0-1020-gcp, linux-image-generic-lpae-hwe-18.04-edge, linux-image-5.3.0-1017-kvm, linux-aws-5.3, linux-image-virtual, linux-image-5.3.0-1025-raspi2, linux-image-5.3.0-53-generic, linux-image-5.3.0-53-generic-lpae, linux-image-snapdragon-hwe-18.04-edge, linux-image-gcp-edge, linux-image-5.3.0-53-snapdragon, linux-image-lowlatency-hwe-18.04-edge, linux-image-generic-hwe-18.04-edge, linux-image-5.3.0-1022-azure, linux-image-lowlatency-hwe-18.04, linux-image-virtual-hwe-18.04-edge, linux-image-gcp, linux-kvm, linux-image-lowlatency, linux-raspi2, linux-oracle-5.3, linux, linux-image-aws, linux-azure, linux-image-5.3.0-53-lowlatency, linux-image-generic, linux-image-5.3.0-1020-gke, linux-image-virtual-hwe-18.04, linux-image-5.3.0-1019-aws, linux-image-azure-edge, linux-image-5.3.0-1018-oracle, linux-gcp, linux-image-oracle-edge, linux-image-generic-lpae-hwe-18.04, linux-image-snapdragon, linux-image-gke-5.3, linux-oracle, linux-image-oracle, linux-hwe, linux-image-kvm, linux-image-aws-edge, linux-azure-5.3, linux-image-generic-hwe-18.04, linux-gcp-5.3, linux-image-generic-lpae, linux-image-gke, linux-image-raspi2, linux-image-gkeop-5.3, linux-image-snapdragon-hwe-18.04, linux-gke-5.3, linux-aws, linux-image-azure
• USN-4364-1: linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-1107-aws, linux-image-powerpc-e500mc-lts-xenial, linux-image-powerpc64-smp, linux-image-virtual, linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc64-smp-lts-utopic, linux-image-powerpc-smp-lts-wily, linux-image-4.4.0-1071-kvm, linux-image-powerpc64-smp-lts-wily, linux-image-powerpc64-smp-lts-vivid, linux-image-generic-lpae-lts-utopic, linux-image-powerpc-smp-lts-utopic, linux-image-generic-lts-utopic, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-179-powerpc-e500mc, linux-image-powerpc-e500mc, linux-image-generic-lpae-lts-vivid, linux-kvm, linux-image-lowlatency, linux-image-powerpc64-emb-lts-vivid, linux-raspi2, linux-image-generic-lts-wily, linux-image-4.4.0-1067-aws, linux-image-generic-lts-vivid, linux-image-lowlatency-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux-image-virtual-lts-vivid, linux-image-powerpc64-emb, linux, linux-image-aws, linux-image-4.4.0-179-generic-lpae, linux-image-powerpc64-emb-lts-utopic, linux-image-4.4.0-179-lowlatency, linux-image-generic, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc-smp-lts-xenial, linux-lts-xenial, linux-image-4.4.0-179-generic, linux-image-powerpc-smp, linux-image-4.4.0-1133-raspi2, linux-snapdragon, linux-image-4.4.0-179-powerpc64-smp, linux-image-4.4.0-179-powerpc64-emb, linux-image-powerpc64-emb-lts-wily, linux-image-lowlatency-lts-vivid, linux-image-generic-lts-xenial, linux-image-virtual-lts-utopic, linux-image-raspi2, linux-image-snapdragon, linux-image-generic-lpae-lts-wily, linux-image-4.4.0-1137-snapdragon, linux-image-kvm, linux-image-lowlatency-lts-wily, linux-image-generic-lpae, linux-image-lowlatency-lts-xenial, linux-image-powerpc-e500mc-lts-utopic, linux-image-4.4.0-179-powerpc-smp, linux-image-virtual-lts-xenial, linux-aws, linux-image-powerpc-e500mc-lts-wily, linux-image-virtual-lts-wily
• USN-4363-1: linux-image-virtual, linux-image-oem, linux-image-gke-4.15, linux-oem, linux-image-4.15.0-1071-gcp, linux-image-virtual-hwe-16.04-edge, linux-image-generic-hwe-16.04-edge, linux-image-gcp, linux-image-4.15.0-1059-gke, linux-image-lowlatency, linux-kvm, linux-raspi2, linux-image-4.15.0-1039-oracle, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1060-kvm, linux-image-aws-lts-18.04, linux-image-4.15.0-101-generic, linux, linux-azure, linux-image-4.15.0-1081-oem, linux-image-generic, linux-image-lowlatency-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04, linux-image-azure-edge, linux-image-4.15.0-1062-raspi2, linux-gcp, linux-image-4.15.0-1083-azure, linux-snapdragon, linux-image-4.15.0-1079-snapdragon, linux-image-4.15.0-101-lowlatency, linux-image-azure-lts-18.04, linux-image-generic-lpae-hwe-16.04, linux-image-4.15.0-1067-aws, linux-oracle, linux-image-oracle, linux-hwe, linux-image-kvm, linux-image-generic-lpae-hwe-16.04-edge, linux-image-gke, linux-image-generic-hwe-16.04, linux-image-generic-lpae, linux-image-4.15.0-101-generic-lpae, linux-image-raspi2, linux-image-snapdragon, linux-aws-hwe, linux-image-oracle-lts-18.04, linux-aws, linux-image-azure, linux-image-aws-hwe, linux-azure-4.15, linux-gke-4.15
• LSN-0067-1: generic-4.4, aws, lowlatency-4.4, lowlatency-4.15, azure, generic-4.15, gcp, oem
• LSN-0068-1: generic-4.4, aws, lowlatency-4.4, lowlatency-4.15, generic-4.15, oem
• LSN-0072-1: generic-5.4, generic-4.4, aws, lowlatency-4.4, lowlatency-5.4, lowlatency-4.15, azure, generic-4.15, gcp, oem
• USN-4367-1: linux-image-generic-lpae-hwe-18.04-edge, linux-raspi, linux-image-virtual, linux-image-5.4.0-31-generic, linux-aws, linux-image-oem, linux-riscv, linux-image-lowlatency-hwe-18.04-edge, linux-image-generic-hwe-18.04-edge, linux-image-generic-lpae-hwe-20.04, linux-image-lowlatency-hwe-18.04, linux-image-virtual-hwe-20.04, linux-image-generic-hwe-20.04, linux-image-virtual-hwe-18.04-edge, linux-image-gcp, linux-kvm, linux-image-lowlatency, linux-image-5.4.0-1011-gcp, linux-image-5.4.0-1011-raspi, linux, linux-image-aws, linux-azure, linux-image-generic, linux-image-virtual-hwe-18.04, linux-image-oem-osp1, linux-gcp, linux-image-generic-lpae-hwe-18.04, linux-image-5.4.0-1011-aws, linux-image-5.4.0-26-generic, linux-image-5.4.0-31-lowlatency, linux-oracle, linux-image-oracle, linux-image-5.4.0-1012-azure, linux-image-kvm, linux-image-5.4.0-31-generic-lpae, linux-image-generic-hwe-18.04, linux-image-gke, linux-image-generic-lpae, linux-image-lowlatency-hwe-20.04, linux-image-raspi, linux-image-raspi2, linux-image-5.4.0-1011-oracle, linux-image-azure, linux-image-5.4.0-1011-kvm
• USN-4345-1: linux-image-virtual, linux-image-4.15.0-1080-oem, linux-aws, linux-image-oem, linux-image-4.15.0-1038-oracle, linux-image-4.15.0-1066-aws, linux-image-gke-4.15, linux-oem, linux-image-4.15.0-99-generic-lpae, linux-image-virtual-hwe-16.04-edge, linux-image-generic-hwe-16.04-edge, linux-image-4.15.0-1059-kvm, linux-image-gcp, linux-kvm, linux-image-lowlatency, linux-raspi2, linux-image-virtual-hwe-16.04, linux-image-aws-lts-18.04, linux, linux-image-4.15.0-99-generic, linux-azure, linux-image-4.15.0-1061-gcp, linux-image-generic, linux-image-lowlatency-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04, linux-image-azure-edge, linux-gcp, linux-image-4.15.0-1058-gke, linux-snapdragon, linux-image-generic-lpae-hwe-16.04, linux-image-4.15.0-1077-snapdragon, linux-oracle, linux-image-oracle, linux-hwe, linux-image-kvm, linux-image-4.15.0-99-lowlatency, linux-image-generic-lpae-hwe-16.04-edge, linux-image-generic-hwe-16.04, linux-image-generic-lpae, linux-image-gke, linux-image-raspi2, linux-image-snapdragon, linux-aws-hwe, linux-image-oracle-lts-18.04, linux-image-4.15.0-1061-raspi2, linux-image-4.15.0-1082-azure, linux-image-azure, linux-image-aws-hwe, linux-gke-4.15