USN-4412-1: Linux kernel vulnerabilities
6 July 2020
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-aws-5.3 - Linux kernel for Amazon Web Services (AWS) systems
- linux-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-azure-5.3 - Linux kernel for Microsoft Azure Cloud systems
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-5.3 - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke-5.3 - Linux kernel for Google Container Engine (GKE) systems
- linux-hwe - Linux hardware enablement (HWE) kernel
- linux-kvm - Linux kernel for cloud environments
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-oracle-5.3 - Linux kernel for Oracle Cloud systems
- linux-raspi2-5.3 - Linux kernel for Raspberry Pi (V7) systems
Details
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)
Dmitry Vyukov discovered that the SELinux netlink security hook in the
Linux kernel did not validate messages in some situations. A privileged
attacker could use this to bypass SELinux netlink restrictions.
(CVE-2020-10751)
It was discovered that the KVM implementation in the Linux kernel did not
properly deallocate memory on initialization for some processors. A local
attacker could possibly use this to cause a denial of service.
(CVE-2020-12768)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 19.10
-
linux-image-5.3.0-1024-kvm
-
5.3.0-1024.26
-
linux-image-5.3.0-1028-oracle
-
5.3.0-1028.30
-
linux-image-5.3.0-1030-aws
-
5.3.0-1030.32
-
linux-image-5.3.0-1030-gcp
-
5.3.0-1030.32
-
linux-image-5.3.0-1032-azure
-
5.3.0-1032.33
-
linux-image-5.3.0-62-generic
-
5.3.0-62.56
-
linux-image-5.3.0-62-generic-lpae
-
5.3.0-62.56
-
linux-image-5.3.0-62-lowlatency
-
5.3.0-62.56
-
linux-image-5.3.0-62-snapdragon
-
5.3.0-62.56
-
linux-image-aws
-
5.3.0.1030.40
-
linux-image-azure
-
5.3.0.1032.50
-
linux-image-gcp
-
5.3.0.1030.40
-
linux-image-generic
-
5.3.0.62.52
-
linux-image-generic-lpae
-
5.3.0.62.52
-
linux-image-gke
-
5.3.0.1030.40
-
linux-image-kvm
-
5.3.0.1024.22
-
linux-image-lowlatency
-
5.3.0.62.52
-
linux-image-oracle
-
5.3.0.1028.43
-
linux-image-snapdragon
-
5.3.0.62.52
-
linux-image-virtual
-
5.3.0.62.52
Ubuntu 18.04
-
linux-image-5.3.0-1028-oracle
-
5.3.0-1028.30~18.04.1
-
linux-image-5.3.0-1028-raspi2
-
5.3.0-1028.30~18.04.2
-
linux-image-5.3.0-1030-aws
-
5.3.0-1030.32~18.04.1
-
linux-image-5.3.0-1030-gcp
-
5.3.0-1030.32~18.04.1
-
linux-image-5.3.0-1030-gke
-
5.3.0-1030.32~18.04.1
-
linux-image-5.3.0-1032-azure
-
5.3.0-1032.33~18.04.1
-
linux-image-5.3.0-62-generic
-
5.3.0-62.56~18.04.1
-
linux-image-5.3.0-62-generic-lpae
-
5.3.0-62.56~18.04.1
-
linux-image-5.3.0-62-lowlatency
-
5.3.0-62.56~18.04.1
-
linux-image-aws
-
5.3.0.1030.28
-
linux-image-azure
-
5.3.0.1032.28
-
linux-image-gcp
-
5.3.0.1030.24
-
linux-image-generic-hwe-18.04
-
5.3.0.62.115
-
linux-image-generic-lpae-hwe-18.04
-
5.3.0.62.115
-
linux-image-gke-5.3
-
5.3.0.1030.15
-
linux-image-gkeop-5.3
-
5.3.0.62.115
-
linux-image-lowlatency-hwe-18.04
-
5.3.0.62.115
-
linux-image-oracle
-
5.3.0.1028.25
-
linux-image-raspi2-hwe-18.04
-
5.3.0.1028.17
-
linux-image-snapdragon-hwe-18.04
-
5.3.0.62.115
-
linux-image-virtual-hwe-18.04
-
5.3.0.62.115
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-oem, linux-image-lowlatency-hwe-18.04, linux-azure, linux-image-5.4.0-1013-raspi, linux-image-aws, linux-aws, linux-image-generic-lpae-hwe-18.04, linux-image-virtual-hwe-20.04, linux-image-generic-lpae-hwe-20.04, linux-image-5.4.0-1019-gcp, linux-image-virtual, linux-image-generic-hwe-20.04, linux-gcp, linux-image-5.4.0-1019-oracle, linux-image-lowlatency-hwe-20.04, linux-image-raspi2, linux-image-lowlatency-hwe-18.04-edge, linux-image-virtual-hwe-18.04, linux-riscv, linux-image-5.4.0-28-generic, linux-image-gke, linux-image-gcp, linux-image-generic-lpae, linux-image-5.4.0-1018-aws, linux-image-5.4.0-40-generic-lpae, linux, linux-image-oem-osp1, linux-image-generic, linux-image-raspi, linux-image-generic-hwe-18.04-edge, linux-kvm, linux-image-generic-hwe-18.04, linux-image-generic-lpae-hwe-18.04-edge, linux-image-kvm, linux-image-virtual-hwe-18.04-edge, linux-oracle, linux-raspi, linux-image-5.4.0-40-generic, linux-image-lowlatency, linux-image-azure, linux-image-5.4.0-40-lowlatency, linux-image-oracle, linux-image-5.4.0-1020-azure
- USN-4413-1: linux-image-5.0.0-1063-oem-osp1, linux-image-gke-5.0, linux-image-5.0.0-1043-gke, linux-oem-osp1, linux-gke-5.0, linux-image-oem-osp1
- USN-4414-1: linux-hwe, linux-image-4.15.0-1081-snapdragon, linux-image-4.15.0-1074-aws, linux-image-oem, linux-oem, linux-azure-4.15, linux-azure, linux-image-gcp-lts-18.04, linux-image-4.15.0-107-lowlatency, linux-aws, linux-image-4.15.0-109-lowlatency, linux-raspi2, linux-image-4.15.0-1046-oracle, linux-image-generic-lpae-hwe-16.04, linux-image-azure-edge, linux-image-virtual, linux-aws-hwe, linux-image-generic-lpae-hwe-16.04-edge, linux-image-4.15.0-1048-oracle, linux-gcp-4.15, linux-gcp, linux-image-raspi2, linux-image-4.15.0-107-generic, linux-gke-4.15, linux-image-4.15.0-109-generic, linux-image-4.15.0-1091-oem, linux-image-lowlatency-hwe-16.04-edge, linux-image-4.15.0-1091-azure, linux-image-aws-hwe, linux-image-virtual-hwe-16.04, linux-image-virtual-hwe-16.04-edge, linux-image-azure-lts-18.04, linux-image-4.15.0-1064-gke, linux-image-gke, linux-image-4.15.0-1077-aws, linux-image-gcp, linux-image-aws-lts-18.04, linux-snapdragon, linux-image-generic-hwe-16.04-edge, linux-image-generic-lpae, linux-image-4.15.0-107-generic-lpae, linux-image-lowlatency-hwe-16.04, linux-image-generic-hwe-16.04, linux, linux-kvm, linux-image-generic, linux-image-4.15.0-1069-kvm, linux-image-kvm, linux-image-oracle-lts-18.04, linux-image-snapdragon, linux-oracle, linux-image-4.15.0-1065-raspi2, linux-image-lowlatency, linux-image-azure, linux-image-4.15.0-1078-gcp, linux-image-oracle, linux-image-gke-4.15, linux-image-4.15.0-109-generic-lpae
- USN-4419-1: linux-image-powerpc-e500mc-lts-utopic, linux-snapdragon, linux-image-lowlatency-lts-vivid, linux-image-aws, linux-image-powerpc-smp-lts-xenial, linux-aws, linux-image-generic-lpae-lts-wily, linux-image-virtual-lts-utopic, linux-raspi2, linux-image-virtual-lts-wily, linux-image-powerpc64-smp-lts-utopic, linux-image-4.4.0-185-generic-lpae, linux-image-generic-lts-wily, linux-image-4.4.0-1110-aws, linux-image-generic-lts-xenial, linux-image-virtual, linux-image-generic-lpae-lts-vivid, linux-image-powerpc-e500mc-lts-vivid, linux-image-virtual-lts-vivid, linux-image-4.4.0-185-powerpc64-emb, linux-image-generic-lpae-lts-utopic, linux-image-generic-lts-utopic, linux-image-raspi2, linux-image-lowlatency-lts-wily, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc-e500mc-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc-smp-lts-vivid, linux-lts-xenial, linux-image-4.4.0-1135-raspi2, linux-image-lowlatency-lts-utopic, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-185-generic, linux-image-4.4.0-1074-aws, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-185-powerpc64-smp, linux-image-generic-lts-vivid, linux-image-generic-lpae, linux-image-powerpc-smp-lts-wily, linux-image-powerpc64-smp, linux-image-4.4.0-185-powerpc-smp, linux-image-powerpc-e500mc, linux-image-powerpc64-smp-lts-vivid, linux, linux-image-lowlatency-lts-xenial, linux-image-generic, linux-kvm, linux-image-kvm, linux-image-powerpc64-emb-lts-vivid, linux-image-snapdragon, linux-image-powerpc-smp, linux-image-powerpc64-emb-lts-wily, linux-image-4.4.0-185-lowlatency, linux-image-lowlatency, linux-image-4.4.0-1139-snapdragon, linux-image-4.4.0-1076-kvm, linux-image-powerpc64-emb, linux-image-powerpc64-smp-lts-wily, linux-image-4.4.0-185-powerpc-e500mc, linux-image-virtual-lts-xenial, linux-image-powerpc64-emb-lts-utopic, linux-image-powerpc-smp-lts-utopic
- USN-4391-1: linux-image-powerpc-e500mc-lts-utopic, linux-image-4.4.0-184-powerpc-smp, linux-image-lowlatency-lts-vivid, linux-image-aws, linux-image-4.4.0-1075-kvm, linux-aws, linux-image-generic-lpae-lts-wily, linux-image-powerpc-smp-lts-xenial, linux-image-virtual-lts-utopic, linux-raspi2, linux-image-virtual-lts-wily, linux-image-powerpc64-smp-lts-utopic, linux-image-generic-lts-wily, linux-image-generic-lts-xenial, linux-image-virtual, linux-image-4.4.0-184-lowlatency, linux-image-4.4.0-184-powerpc64-emb, linux-image-generic-lpae-lts-vivid, linux-image-powerpc-e500mc-lts-vivid, linux-image-virtual-lts-vivid, linux-image-4.4.0-184-generic, linux-image-generic-lpae-lts-utopic, linux-image-generic-lts-utopic, linux-image-raspi2, linux-image-lowlatency-lts-wily, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc-e500mc-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-1073-aws, linux-image-powerpc-smp-lts-vivid, linux-image-4.4.0-1138-snapdragon, linux-lts-xenial, linux-image-4.4.0-184-generic-lpae, linux-image-lowlatency-lts-utopic, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-generic-lts-vivid, linux-image-powerpc-smp-lts-wily, linux-image-generic-lpae, linux-image-powerpc64-smp-lts-vivid, linux-image-powerpc64-smp, linux-image-powerpc-e500mc, linux-image-4.4.0-184-powerpc-e500mc, linux-snapdragon, linux, linux-image-4.4.0-1134-raspi2, linux-image-generic, linux-image-lowlatency-lts-xenial, linux-kvm, linux-image-kvm, linux-image-powerpc64-emb-lts-vivid, linux-image-4.4.0-1109-aws, linux-image-snapdragon, linux-image-4.4.0-184-powerpc64-smp, linux-image-powerpc-smp, linux-image-powerpc64-emb-lts-wily, linux-image-lowlatency, linux-image-powerpc64-emb, linux-image-powerpc64-smp-lts-wily, linux-image-virtual-lts-xenial, linux-image-powerpc64-emb-lts-utopic, linux-image-powerpc-smp-lts-utopic
- USN-4390-1: linux-image-4.15.0-1063-raspi2, linux-hwe, linux-image-4.15.0-106-generic, linux-image-oem, linux-oem, linux-image-4.15.0-106-generic-lpae, linux-azure-4.15, linux-azure, linux-image-4.15.0-1073-aws, linux-aws, linux-raspi2, linux-image-generic-lpae-hwe-16.04, linux-image-azure-edge, linux-image-virtual, linux-aws-hwe, linux-image-generic-lpae-hwe-16.04-edge, linux-image-4.15.0-1045-oracle, linux-gcp, linux-image-raspi2, linux-image-4.15.0-1067-kvm, linux-gke-4.15, linux-image-lowlatency-hwe-16.04-edge, linux-image-virtual-hwe-16.04, linux-image-virtual-hwe-16.04-edge, linux-image-4.15.0-1080-snapdragon, linux-image-aws-hwe, linux-image-4.15.0-106-lowlatency, linux-image-azure-lts-18.04, linux-image-gke, linux-image-gcp, linux-image-aws-lts-18.04, linux-snapdragon, linux-image-generic-hwe-16.04-edge, linux-image-4.15.0-1063-gke, linux-image-4.15.0-1089-azure, linux-image-generic-lpae, linux-image-generic-hwe-16.04, linux-image-lowlatency-hwe-16.04, linux, linux-kvm, linux-image-generic, linux-image-kvm, linux-image-oracle-lts-18.04, linux-image-snapdragon, linux-oracle, linux-image-lowlatency, linux-image-4.15.0-1077-gcp, linux-image-azure, linux-image-oracle, linux-image-gke-4.15, linux-image-4.15.0-1087-oem
- USN-4389-1: linux-image-5.4.0-1015-aws, linux-image-oem, linux-image-lowlatency-hwe-18.04, linux-azure, linux-image-5.4.0-1015-gcp, linux-image-5.4.0-1015-kvm, linux-image-aws, linux-image-5.4.0-37-generic, linux-aws, linux-image-generic-lpae-hwe-18.04, linux-image-virtual-hwe-20.04, linux-image-generic-lpae-hwe-20.04, linux-image-5.4.0-27-generic, linux-image-virtual, linux-image-5.4.0-37-lowlatency, linux-image-generic-hwe-20.04, linux-gcp, linux-image-5.4.0-1015-oracle, linux-image-lowlatency-hwe-20.04, linux-image-raspi2, linux-image-5.4.0-1012-raspi, linux-image-lowlatency-hwe-18.04-edge, linux-image-virtual-hwe-18.04, linux-riscv, linux-image-gke, linux-image-gcp, linux-image-generic-lpae, linux, linux-image-oem-osp1, linux-image-generic, linux-image-raspi, linux-image-generic-hwe-18.04-edge, linux-kvm, linux-image-generic-hwe-18.04, linux-image-generic-lpae-hwe-18.04-edge, linux-image-kvm, linux-image-5.4.0-37-generic-lpae, linux-image-virtual-hwe-18.04-edge, linux-oracle, linux-raspi, linux-image-lowlatency, linux-image-azure, linux-image-oracle, linux-image-5.4.0-1016-azure