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USN-4093-1: Linux kernel vulnerabilities

13 August 2019

Several security issues were fixed in the Linux kernel.

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Releases

Packages

Details

It was discovered that a heap buffer overflow existed in the Marvell
Wireless LAN device driver for the Linux kernel. An attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-10126)

Andrei Vlad Lutas and Dan Lutas discovered that some x86 processors
incorrectly handle SWAPGS instructions during speculative execution. A
local attacker could use this to expose sensitive information (kernel
memory). (CVE-2019-1125)

It was discovered that the PowerPC dlpar implementation in the Linux kernel
did not properly check for allocation errors in some situations. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-12614)

It was discovered that a NULL pointer dereference vulnerability existed in
the Near-field communication (NFC) implementation in the Linux kernel. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2019-12984)

Jann Horn discovered a use-after-free vulnerability in the Linux kernel
when accessing LDT entries in some situations. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2019-13233)

Jann Horn discovered that the ptrace implementation in the Linux kernel did
not properly record credentials in some situations. A local attacker could
use this to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2019-13272)

It was discovered that the Marvell Wireless LAN device driver in the Linux
kernel did not properly validate the BSS descriptor. A local attacker could
possibly use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-3846)

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 19.04
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-4118-1: linux-aws-hwe, linux-image-aws-hwe, linux-image-4.15.0-1047-aws, linux-aws, linux-image-aws
  • USN-4095-1: linux-image-lowlatency-lts-vivid, linux-image-generic-lts-utopic, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc64-smp, linux-snapdragon, linux-image-4.4.0-1118-raspi2, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc64-emb, linux-image-powerpc64-emb-lts-utopic, linux-image-snapdragon, linux-image-4.4.0-159-generic, linux-image-4.4.0-1090-aws, linux-image-generic-lts-xenial, linux-image-powerpc-e500mc-lts-utopic, linux-image-generic-lpae-lts-utopic, linux-image-powerpc-e500mc, linux-image-4.4.0-159-powerpc-smp, linux-image-lowlatency, linux-raspi2, linux-image-powerpc64-smp-lts-wily, linux-image-4.4.0-159-powerpc64-emb, linux-image-powerpc-smp-lts-utopic, linux-aws, linux-image-generic-lpae-lts-vivid, linux-image-virtual-lts-utopic, linux-image-generic-lpae, linux, linux-image-aws, linux-image-virtual-lts-wily, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-159-lowlatency, linux-image-generic-lts-wily, linux-image-powerpc64-smp-lts-vivid, linux-image-virtual-lts-xenial, linux-image-powerpc64-emb-lts-wily, linux-image-generic-lpae-lts-wily, linux-kvm, linux-image-powerpc-e500mc-lts-wily, linux-image-4.4.0-159-powerpc64-smp, linux-image-powerpc64-smp-lts-xenial, linux-image-raspi2, linux-image-powerpc-smp-lts-vivid, linux-image-powerpc64-emb-lts-vivid, linux-image-virtual-lts-vivid, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual, linux-image-powerpc-e500mc-lts-vivid, linux-image-generic-lpae-lts-xenial, linux-image-powerpc-smp, linux-image-powerpc-smp-lts-wily, linux-image-4.4.0-1054-kvm, linux-image-powerpc64-smp-lts-utopic, linux-image-lowlatency-lts-wily, linux-image-4.4.0-159-generic-lpae, linux-image-4.4.0-159-powerpc-e500mc, linux-image-generic-lts-vivid, linux-image-kvm, linux-image-lowlatency-lts-utopic, linux-image-4.4.0-1122-snapdragon, linux-image-generic
  • USN-4094-1: linux-image-4.15.0-1021-oracle, linux-snapdragon, linux-hwe, linux-image-generic-lpae-hwe-16.04-edge, linux-image-4.15.0-58-generic-lpae, linux-oem, linux-image-snapdragon, linux-image-4.15.0-1050-oem, linux-image-virtual-hwe-16.04-edge, linux-image-oem, linux-image-lowlatency-hwe-16.04-edge, linux-image-lowlatency, linux-raspi2, linux-image-generic-hwe-16.04-edge, linux-image-generic-hwe-16.04, linux-oracle, linux-image-4.15.0-58-lowlatency, linux-image-generic-lpae-hwe-16.04, linux-image-lowlatency-hwe-16.04, linux-image-generic-lpae, linux-image-oracle, linux, linux-image-4.15.0-1040-gke, linux-image-4.15.0-1043-raspi2, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1040-gcp, linux-kvm, linux-image-gke, linux-image-4.15.0-58-generic, linux-image-raspi2, linux-gke-4.15, linux-image-virtual, linux-image-4.15.0-1042-kvm, linux-azure, linux-gcp, linux-image-4.15.0-1060-snapdragon, linux-image-gcp, linux-image-kvm, linux-image-gke-4.15, linux-image-generic
  • USN-4117-1: linux-image-aws, linux-image-5.0.0-1014-aws, linux-aws
  • USN-4095-2: linux-image-powerpc-smp-lts-xenial, linux-image-powerpc64-emb-lts-xenial, linux-lts-xenial, linux-image-4.4.0-159-generic, linux-image-generic-lts-xenial, linux-image-4.4.0-159-powerpc-smp, linux-image-4.4.0-159-powerpc64-emb, linux-aws, linux-image-aws, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-159-lowlatency, linux-image-virtual-lts-xenial, linux-image-4.4.0-159-powerpc64-smp, linux-image-powerpc64-smp-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-1050-aws, linux-image-4.4.0-159-generic-lpae, linux-image-4.4.0-159-powerpc-e500mc, linux-image-powerpc-e500mc-lts-xenial
  • USN-4096-1: linux-aws-hwe, linux-image-aws-hwe, linux-aws, linux-image-4.15.0-1045-aws, linux-image-5.0.0-1012-aws, linux-image-aws