1. Ubuntu Security Notices
  2. USN-4144-1

USN-4144-1: Linux kernel vulnerabilities

Publication date

1 October 2019

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that the XFS file system in the Linux kernel did not
properly handle mount failures in some situations. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2018-20976)

Benjamin Moody discovered that the XFS file system in the Linux kernel did
not properly handle an error condition when out of disk quota. A local
attacker could possibly use this to cause a denial of service.
(CVE-2019-15538)

It was discovered that the XFS file system in the Linux kernel did not
properly handle mount failures in some situations. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2018-20976)

Benjamin Moody discovered that the XFS file system in the Linux kernel did
not properly handle an error condition when out of disk quota. A local
attacker could possibly use this to cause a denial of service.
(CVE-2019-15538)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
18.04 bionic linux-image-4.15.0-1026-oracle –  4.15.0-1026.29
linux-image-4.15.0-1047-kvm –  4.15.0-1047.47
linux-image-4.15.0-1048-raspi2 –  4.15.0-1048.52
linux-image-4.15.0-1051-aws –  4.15.0-1051.53
linux-image-4.15.0-1057-oem –  4.15.0-1057.66
linux-image-4.15.0-1065-snapdragon –  4.15.0-1065.72
linux-image-4.15.0-65-generic –  4.15.0-65.74
linux-image-4.15.0-65-generic-lpae –  4.15.0-65.74
linux-image-4.15.0-65-lowlatency –  4.15.0-65.74
linux-image-aws –  4.15.0.1051.50
linux-image-generic –  4.15.0.65.67
linux-image-generic-lpae –  4.15.0.65.67
linux-image-kvm –  4.15.0.1047.47
linux-image-lowlatency –  4.15.0.65.67
linux-image-oem –  4.15.0.1057.61
linux-image-oracle –  4.15.0.1026.29
linux-image-raspi2 –  4.15.0.1048.46
linux-image-snapdragon –  4.15.0.1065.68
linux-image-virtual –  4.15.0.65.67
16.04 xenial linux-image-4.15.0-1026-oracle –  4.15.0-1026.29~16.04.1
linux-image-4.15.0-1051-aws –  4.15.0-1051.53~16.04.1
linux-image-4.15.0-1060-azure –  4.15.0-1060.65
linux-image-4.15.0-65-generic –  4.15.0-65.74~16.04.1
linux-image-4.15.0-65-generic-lpae –  4.15.0-65.74~16.04.1
linux-image-4.15.0-65-lowlatency –  4.15.0-65.74~16.04.1
linux-image-aws-hwe –  4.15.0.1051.51
linux-image-azure –  4.15.0.1060.63
linux-image-generic-hwe-16.04 –  4.15.0.65.85
linux-image-generic-lpae-hwe-16.04 –  4.15.0.65.85
linux-image-lowlatency-hwe-16.04 –  4.15.0.65.85
linux-image-oem –  4.15.0.65.85
linux-image-oracle –  4.15.0.1026.19
linux-image-virtual-hwe-16.04 –  4.15.0.65.85

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References

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