USN-3847-1: Linux kernel vulnerabilities

Releases

• Ubuntu 18.04 ESM

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-azure - Linux kernel for Microsoft Azure Cloud systems
• linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
• linux-kvm - Linux kernel for cloud environments
• linux-oem - Linux kernel for OEM processors
• linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

It was discovered that a race condition existed in the raw MIDI driver for
the Linux kernel, leading to a double free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2018-10902)

It was discovered that an integer overrun vulnerability existed in the
POSIX timers implementation in the Linux kernel. A local attacker could use
this to cause a denial of service. (CVE-2018-12896)

Noam Rathaus discovered that a use-after-free vulnerability existed in the
Infiniband implementation in the Linux kernel. An attacker could use this
to cause a denial of service (system crash). (CVE-2018-14734)

It was discovered that the YUREX USB device driver for the Linux kernel did
not properly restrict user space reads or writes. A physically proximate
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2018-16276)

It was discovered that the BPF verifier in the Linux kernel did not
correctly compute numeric bounds in some situations. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2018-18445)

Kanda Motohiro discovered that writing extended attributes to an XFS file
system in the Linux kernel in certain situations could cause an error
condition to occur. A local attacker could use this to cause a denial of
service. (CVE-2018-18690)

It was discovered that an integer overflow vulnerability existed in the
CDROM driver of the Linux kernel. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2018-18710)

Update instructions

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

Ubuntu 18.04

• linux-image-4.15.0-1028-kvm - 4.15.0-1028.28
• linux-image-4.15.0-1030-raspi2 - 4.15.0-1030.32
• linux-image-4.15.0-1031-aws - 4.15.0-1031.33
• linux-image-4.15.0-43-generic - 4.15.0-43.46
• linux-image-4.15.0-43-generic-lpae - 4.15.0-43.46
• linux-image-4.15.0-43-lowlatency - 4.15.0-43.46
• linux-image-4.15.0-43-snapdragon - 4.15.0-43.46

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-2018-10902
• CVE-2018-12896
• CVE-2018-14734
• CVE-2018-16276
• CVE-2018-18445
• CVE-2018-18690
• CVE-2018-18710

Related notices

• USN-3847-2: linux-hwe, linux-image-4.15.0-43-generic-lpae, linux-image-4.15.0-43-lowlatency, linux-image-unsigned-4.15.0-43-lowlatency, linux-aws-hwe, linux-image-4.15.0-43-generic, linux-image-unsigned-4.15.0-43-generic, linux-azure, linux-gcp, linux-image-4.15.0-1031-aws, linux-image-unsigned-4.15.0-1026-gcp, linux-image-unsigned-4.15.0-1036-azure
• USN-3847-3: linux-azure, linux-image-unsigned-4.15.0-1036-azure
• USN-3776-1: linux-image-extra-4.4.0-137-generic, linux-image-4.4.0-137-generic-lpae, linux-image-4.4.0-137-generic, linux-image-4.4.0-137-powerpc64-emb, linux-kvm, linux-image-4.4.0-1035-kvm, linux-image-4.4.0-137-lowlatency, linux-image-4.4.0-137-powerpc-e500mc, linux-aws, linux-image-4.4.0-137-powerpc-smp, linux, linux-image-4.4.0-137-powerpc64-smp, linux-image-4.4.0-1098-raspi2, linux-snapdragon, linux-raspi2, linux-image-4.4.0-1102-snapdragon, linux-image-4.4.0-1069-aws
• USN-3776-2: linux-lts-xenial, linux-image-extra-4.4.0-137-generic, linux-image-4.4.0-137-generic-lpae, linux-image-4.4.0-137-generic, linux-image-4.4.0-137-powerpc64-emb, linux-image-4.4.0-137-lowlatency, linux-image-4.4.0-137-powerpc-e500mc, linux-aws, linux-image-4.4.0-1031-aws, linux-image-4.4.0-137-powerpc-smp, linux-image-4.4.0-137-powerpc64-smp
• USN-3849-2: linux-image-3.13.0-164-generic, linux-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-164-generic-lpae
• USN-3849-1: linux-image-3.13.0-164-generic, linux-image-3.13.0-164-powerpc-e500mc, linux-image-3.13.0-164-powerpc64-emb, linux-image-3.13.0-164-powerpc-e500, linux-image-extra-3.13.0-164-generic, linux, linux-image-3.13.0-164-powerpc64-smp, linux-image-3.13.0-164-lowlatency, linux-image-3.13.0-164-powerpc-smp, linux-image-3.13.0-164-generic-lpae
• USN-3848-1: linux-image-4.4.0-1074-aws, linux-image-4.4.0-1102-raspi2, linux-image-4.4.0-141-powerpc64-smp, linux-kvm, linux-image-4.4.0-1106-snapdragon, linux-image-extra-4.4.0-141-generic, linux-image-4.4.0-141-lowlatency, linux-aws, linux-image-4.4.0-141-powerpc64-emb, linux-image-4.4.0-141-generic-lpae, linux, linux-raspi2, linux-image-4.4.0-1039-kvm, linux-image-4.4.0-141-powerpc-e500mc, linux-image-4.4.0-141-generic, linux-image-4.4.0-141-powerpc-smp, linux-snapdragon
• USN-3848-2: linux-lts-xenial, linux-image-4.4.0-141-powerpc64-smp, linux-image-4.4.0-1037-aws, linux-image-extra-4.4.0-141-generic, linux-image-4.4.0-141-lowlatency, linux-aws, linux-image-4.4.0-141-powerpc64-emb, linux-image-4.4.0-141-generic-lpae, linux-image-4.4.0-141-powerpc-e500mc, linux-image-4.4.0-141-generic, linux-image-4.4.0-141-powerpc-smp
• USN-3797-2: linux-lts-xenial, linux-image-4.4.0-138-powerpc-e500mc, linux-image-4.4.0-138-generic-lpae, linux-image-extra-4.4.0-138-generic, linux-aws, linux-image-4.4.0-138-powerpc64-emb, linux-image-4.4.0-138-generic, linux-image-4.4.0-1032-aws, linux-image-4.4.0-138-lowlatency, linux-image-4.4.0-138-powerpc-smp, linux-image-4.4.0-138-powerpc64-smp
• USN-3797-1: linux-image-4.4.0-1036-kvm, linux-image-4.4.0-138-powerpc-e500mc, linux-kvm, linux-image-4.4.0-138-generic-lpae, linux-image-4.4.0-1099-raspi2, linux-image-extra-4.4.0-138-generic, linux-aws, linux, linux-image-4.4.0-1103-snapdragon, linux-image-4.4.0-138-generic, linux-image-4.4.0-138-powerpc64-emb, linux-image-4.4.0-138-lowlatency, linux-image-4.4.0-138-powerpc-smp, linux-image-4.4.0-138-powerpc64-smp, linux-raspi2, linux-image-4.4.0-1070-aws, linux-snapdragon
• USN-3835-1: linux-image-4.18.0-12-lowlatency, linux-image-4.18.0-1007-raspi2, linux-image-snapdragon, linux-image-4.18.0-1004-gcp, linux-image-raspi2, linux-image-gcp, linux-image-generic-lpae, linux, linux-image-generic, linux-image-4.18.0-12-snapdragon, linux-kvm, linux-image-gke, linux-image-4.18.0-12-generic, linux-image-4.18.0-1005-kvm, linux-image-lowlatency, linux-gcp, linux-image-4.18.0-12-generic-lpae, linux-raspi2, linux-image-kvm
• USN-3832-1: linux-image-4.18.0-1006-aws, linux-image-aws, linux-aws
• USN-3846-1: linux-image-4.18.0-1008-raspi2, linux-image-4.18.0-1007-azure, linux-image-4.18.0-13-lowlatency, linux-image-snapdragon, linux-image-4.18.0-1005-gcp, linux-image-raspi2, linux-image-azure, linux-image-4.18.0-13-generic, linux-image-gcp, linux-image-generic-lpae, linux-aws, linux, linux-image-generic, linux-image-4.18.0-1007-aws, linux-kvm, linux-image-4.18.0-13-generic-lpae, linux-image-gke, linux-azure, linux-image-4.18.0-1006-kvm, linux-image-4.18.0-13-snapdragon, linux-image-aws, linux-image-lowlatency, linux-gcp, linux-image-kvm, linux-raspi2