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Ubuntu: (Multiple Advisories) (CVE-2018-18397): Linux kernel (HWE) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2018-18397): Linux kernel (HWE) vulnerabilities

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:P/A:N)
Published
12/12/2018
Created
03/19/2019
Added
03/13/2019
Modified
09/12/2020

Description

The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1009-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1028-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1030-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1032-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1033-aws
  • ubuntu-upgrade-linux-image-4-15-0-1034-oem
  • ubuntu-upgrade-linux-image-4-15-0-1040-azure
  • ubuntu-upgrade-linux-image-4-15-0-46-generic
  • ubuntu-upgrade-linux-image-4-15-0-46-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-46-lowlatency
  • ubuntu-upgrade-linux-image-4-15-0-46-snapdragon
  • ubuntu-upgrade-linux-image-4-18-0-1007-gcp
  • ubuntu-upgrade-linux-image-4-18-0-1008-kvm
  • ubuntu-upgrade-linux-image-4-18-0-1010-raspi2
  • ubuntu-upgrade-linux-image-4-18-0-1013-azure
  • ubuntu-upgrade-linux-image-4-18-0-16-generic
  • ubuntu-upgrade-linux-image-4-18-0-16-generic-lpae
  • ubuntu-upgrade-linux-image-4-18-0-16-lowlatency
  • ubuntu-upgrade-linux-image-4-18-0-16-snapdragon
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04

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