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Ubuntu: (Multiple Advisories) (CVE-2018-18281): Linux kernel (Azure) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2018-18281): Linux kernel (Azure) vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
10/30/2018
Created
03/19/2019
Added
12/07/2018
Modified
03/09/2021

Description

Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.

Solution(s)

  • ubuntu-upgrade-linux-image-3-13-0-165-generic
  • ubuntu-upgrade-linux-image-3-13-0-165-generic-lpae
  • ubuntu-upgrade-linux-image-3-13-0-165-lowlatency
  • ubuntu-upgrade-linux-image-3-13-0-165-powerpc-e500
  • ubuntu-upgrade-linux-image-3-13-0-165-powerpc-e500mc
  • ubuntu-upgrade-linux-image-3-13-0-165-powerpc-smp
  • ubuntu-upgrade-linux-image-3-13-0-165-powerpc64-emb
  • ubuntu-upgrade-linux-image-3-13-0-165-powerpc64-smp
  • ubuntu-upgrade-linux-image-4-15-0-1027-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1029-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1031-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1032-aws
  • ubuntu-upgrade-linux-image-4-15-0-1033-oem
  • ubuntu-upgrade-linux-image-4-15-0-1037-azure
  • ubuntu-upgrade-linux-image-4-15-0-44-generic
  • ubuntu-upgrade-linux-image-4-15-0-44-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-44-lowlatency
  • ubuntu-upgrade-linux-image-4-15-0-44-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-45-generic
  • ubuntu-upgrade-linux-image-4-15-0-45-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-45-lowlatency
  • ubuntu-upgrade-linux-image-4-15-0-45-snapdragon
  • ubuntu-upgrade-linux-image-4-18-0-1004-gcp
  • ubuntu-upgrade-linux-image-4-18-0-1005-kvm
  • ubuntu-upgrade-linux-image-4-18-0-1006-aws
  • ubuntu-upgrade-linux-image-4-18-0-1007-raspi2
  • ubuntu-upgrade-linux-image-4-18-0-12-generic
  • ubuntu-upgrade-linux-image-4-18-0-12-generic-lpae
  • ubuntu-upgrade-linux-image-4-18-0-12-lowlatency
  • ubuntu-upgrade-linux-image-4-18-0-12-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-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae-lts-trusty
  • ubuntu-upgrade-linux-image-generic-lts-trusty
  • 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-oem
  • ubuntu-upgrade-linux-image-powerpc-e500
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-virtual-hwe-16-04

References

  • USN-3753-1
  • USN-3753-2
  • USN-3754-1
  • USN-3821-1
  • USN-3821-2
  • USN-3832-1
  • USN-3835-1
  • USN-3871-1
  • USN-3871-2
  • USN-3871-3
  • USN-3871-4
  • USN-3871-5
  • USN-3872-1
  • USN-3878-1
  • USN-3878-2
  • USN-3879-1
  • USN-3879-2
  • USN-3880-1
  • USN-3880-2
  • CVE-2018-18281
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