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USN-4419-1: Linux kernel vulnerabilities

6 July 2020

Several security issues were fixed in the Linux kernel.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

Details

It was discovered that a race condition existed in the Precision Time
Protocol (PTP) implementation in the Linux kernel, leading to a use-after-
free vulnerability. A local attacker could possibly use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2020-10690)

Matthew Sheets discovered that the SELinux network label handling
implementation in the Linux kernel could be coerced into de-referencing a
NULL pointer. A remote attacker could use this to cause a denial of service
(system crash). (CVE-2020-10711)

It was discovered that the SCSI generic (sg) driver in the Linux kernel did
not properly handle certain error conditions correctly. A local privileged
attacker could use this to cause a denial of service (system crash).
(CVE-2020-12770)

It was discovered that the USB Gadget device driver in the Linux kernel did
not validate arguments passed from configfs in some situations. A local
attacker could possibly use this to cause a denial of service (system
crash) or possibly expose sensitive information. (CVE-2020-13143)

Shijie Luo discovered that the ext4 file system implementation in the Linux
kernel did not properly check for a too-large journal size. An attacker
could use this to construct a malicious ext4 image that, when mounted,
could cause a denial of service (soft lockup). (CVE-2020-8992)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 16.04
Ubuntu 14.04

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-4411-1: linux-image-generic-lpae-hwe-18.04-edge, linux-raspi, linux-image-5.4.0-1018-aws, linux-image-virtual, 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-5.4.0-40-generic-lpae, linux-image-lowlatency-hwe-18.04, linux-image-virtual-hwe-20.04, linux-image-5.4.0-1013-raspi, linux-image-generic-hwe-20.04, linux-image-virtual-hwe-18.04-edge, linux-image-gcp, linux-kvm, linux-image-lowlatency, linux-image-5.4.0-1019-oracle, 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-5.4.0-28-generic, linux-image-5.4.0-40-lowlatency, linux-oracle, linux-image-oracle, linux-image-lowlatency-hwe-20.04, linux-image-kvm, linux-image-raspi2, linux-image-generic-hwe-18.04, linux-image-gke, linux-image-generic-lpae, linux-image-5.4.0-40-generic, linux-image-raspi, linux-image-5.4.0-1019-gcp, linux-image-5.4.0-1020-azure, linux-aws, linux-image-azure
  • USN-4412-1: linux-image-5.3.0-1028-oracle, linux-aws-5.3, linux-image-5.3.0-1032-azure, linux-image-virtual, linux-image-5.3.0-62-generic-lpae, linux-image-lowlatency-hwe-18.04, linux-image-gcp, linux-image-raspi2-hwe-18.04, linux-image-lowlatency, linux-kvm, linux-image-5.3.0-1030-aws, linux-oracle-5.3, linux, linux-image-aws, linux-azure, linux-image-generic, linux-image-virtual-hwe-18.04, linux-image-5.3.0-1030-gke, linux-image-5.3.0-62-generic, linux-gcp, linux-image-generic-lpae-hwe-18.04, linux-image-5.3.0-62-lowlatency, linux-image-gke-5.3, linux-oracle, linux-image-oracle, linux-hwe, linux-image-kvm, linux-image-snapdragon, linux-azure-5.3, linux-image-generic-hwe-18.04, linux-gcp-5.3, linux-image-5.3.0-62-snapdragon, linux-image-generic-lpae, linux-image-gke, linux-image-gkeop-5.3, linux-image-snapdragon-hwe-18.04, linux-image-5.3.0-1024-kvm, linux-image-5.3.0-1030-gcp, linux-raspi2-5.3, linux-gke-5.3, linux-image-5.3.0-1028-raspi2, linux-aws, linux-image-azure
  • USN-4413-1: linux-image-5.0.0-1063-oem-osp1, linux-image-oem-osp1, linux-image-5.0.0-1043-gke, linux-gke-5.0, linux-image-gke-5.0, linux-oem-osp1
  • USN-4414-1: linux-image-4.15.0-1081-snapdragon, linux-image-virtual, linux-image-4.15.0-1091-azure, linux-image-4.15.0-107-lowlatency, linux-aws, linux-image-gcp-lts-18.04, linux-image-oem, linux-image-gke-4.15, linux-oem, linux-image-4.15.0-109-generic-lpae, linux-image-4.15.0-107-generic-lpae, linux-image-virtual-hwe-16.04-edge, linux-image-generic-hwe-16.04-edge, linux-image-4.15.0-1091-oem, linux-image-gcp, linux-kvm, linux-image-lowlatency, linux-gcp-4.15, linux-raspi2, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1046-oracle, linux-image-4.15.0-1065-raspi2, linux-image-4.15.0-1069-kvm, linux-image-aws-lts-18.04, linux-image-4.15.0-1074-aws, linux-image-4.15.0-107-generic, linux-image-4.15.0-109-lowlatency, linux, linux-azure, linux-image-lowlatency-hwe-16.04-edge, linux-image-generic, linux-image-lowlatency-hwe-16.04, linux-image-azure-edge, linux-image-4.15.0-109-generic, linux-gcp, linux-snapdragon, linux-image-azure-lts-18.04, linux-image-generic-lpae-hwe-16.04, 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-raspi2, linux-image-snapdragon, linux-image-4.15.0-1078-gcp, linux-aws-hwe, linux-image-4.15.0-1048-oracle, linux-image-4.15.0-1077-aws, linux-image-oracle-lts-18.04, linux-image-4.15.0-1064-gke, linux-image-azure, linux-image-aws-hwe, linux-azure-4.15, linux-gke-4.15
  • USN-4344-1: linux-image-oem-osp1, linux-image-5.0.0-1050-oem-osp1, linux-image-5.0.0-1035-gke, linux-image-gke-5.0, linux-gke-5.0, linux-oem-osp1
  • USN-4342-1: linux-image-5.3.0-51-generic-lpae, linux-image-generic-lpae-hwe-18.04-edge, linux-image-5.3.0-51-generic, linux-image-virtual, linux-image-snapdragon-hwe-18.04-edge, linux-image-gcp-edge, linux-image-lowlatency-hwe-18.04-edge, linux-image-generic-hwe-18.04-edge, linux-image-lowlatency-hwe-18.04, linux-image-5.3.0-1017-aws, linux-image-virtual-hwe-18.04-edge, linux-image-gcp, linux-image-raspi2-hwe-18.04, linux-image-lowlatency, linux-kvm, linux-raspi2, linux-image-5.3.0-1018-gcp, linux-oracle-5.3, linux, linux-image-aws, linux-azure, linux-image-generic, linux-image-5.3.0-1018-gke, linux-image-virtual-hwe-18.04, linux-image-5.3.0-1023-raspi2, linux-image-azure-edge, linux-gcp, linux-image-oracle-edge, linux-image-generic-lpae-hwe-18.04, linux-image-5.3.0-1016-oracle, linux-image-5.3.0-1016-kvm, linux-image-5.3.0-1020-azure, linux-image-gke-5.3, linux-oracle, linux-image-oracle, linux-hwe, linux-image-kvm, linux-image-raspi2, linux-azure-5.3, linux-image-generic-hwe-18.04, linux-gcp-5.3, linux-image-generic-lpae, linux-image-gke, linux-image-5.3.0-51-snapdragon, linux-image-snapdragon, linux-image-snapdragon-hwe-18.04, linux-image-5.3.0-51-lowlatency, linux-gke-5.3, linux-raspi2-5.3, linux-aws, linux-image-azure
  • USN-4324-1: linux-image-4.15.0-1058-kvm, linux-image-4.15.0-1060-raspi2, linux-image-oem, linux-image-gke-4.15, linux-oem, linux-image-gcp, linux-kvm, linux-raspi2, linux-image-aws-lts-18.04, linux-image-aws, linux-azure, linux-image-4.15.0-1076-snapdragon, linux-image-4.15.0-1060-gcp, linux-image-4.15.0-1065-aws, linux-image-azure-edge, linux-gcp, linux-snapdragon, linux-oracle, linux-image-4.15.0-1037-oracle, linux-image-4.15.0-1057-gke, linux-image-oracle, linux-image-4.15.0-1079-oem, linux-image-kvm, linux-image-gke, linux-image-raspi2, linux-image-snapdragon, linux-aws-hwe, linux-image-oracle-lts-18.04, linux-image-4.15.0-1077-azure, linux-aws, linux-image-azure, linux-image-aws-hwe, linux-gke-4.15
  • USN-4318-1: linux, linux-image-4.15.0-96-generic, linux-image-4.15.0-96-generic-lpae, linux-image-generic-hwe-16.04-edge, linux-image-generic, linux-hwe, linux-image-lowlatency-hwe-16.04-edge, linux-image-generic-lpae-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04, linux-image-generic-hwe-16.04, linux-image-4.15.0-96-lowlatency, linux-image-generic-lpae, linux-image-lowlatency, linux-image-virtual, linux-image-virtual-hwe-16.04, linux-image-oem, linux-image-generic-lpae-hwe-16.04, linux-image-virtual-hwe-16.04-edge