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USN-4368-1: Linux kernel vulnerabilities

19 May 2020

Several security issues were fixed in the Linux kernel.

Releases

Packages

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

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