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Ubuntu: (Multiple Advisories) (CVE-2021-22543): Linux kernel vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2021-22543): Linux kernel vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
05/26/2021
Created
09/20/2021
Added
09/09/2021
Modified
03/22/2023

Description

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1028-dell300x
  • ubuntu-upgrade-linux-image-4-15-0-1081-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1096-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1100-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1109-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1112-aws
  • ubuntu-upgrade-linux-image-4-15-0-1113-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1124-azure
  • ubuntu-upgrade-linux-image-4-15-0-159-generic
  • ubuntu-upgrade-linux-image-4-15-0-159-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-159-lowlatency
  • ubuntu-upgrade-linux-image-5-10-0-1049-oem
  • ubuntu-upgrade-linux-image-5-11-0-1015-azure
  • ubuntu-upgrade-linux-image-5-11-0-1015-kvm
  • ubuntu-upgrade-linux-image-5-11-0-1017-aws
  • ubuntu-upgrade-linux-image-5-11-0-1017-oracle
  • ubuntu-upgrade-linux-image-5-11-0-1017-raspi
  • ubuntu-upgrade-linux-image-5-11-0-1017-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-11-0-1018-gcp
  • ubuntu-upgrade-linux-image-5-11-0-34-generic
  • ubuntu-upgrade-linux-image-5-11-0-34-generic-64k
  • ubuntu-upgrade-linux-image-5-11-0-34-generic-lpae
  • ubuntu-upgrade-linux-image-5-11-0-34-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-1023-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1043-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1046-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1052-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1052-gke
  • ubuntu-upgrade-linux-image-5-4-0-1054-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1056-aws
  • ubuntu-upgrade-linux-image-5-4-0-1058-azure
  • ubuntu-upgrade-linux-image-5-4-0-84-generic
  • ubuntu-upgrade-linux-image-5-4-0-84-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-84-lowlatency
  • ubuntu-upgrade-linux-image-5-8-0-1043-azure
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-aws-lts-18-04
  • ubuntu-upgrade-linux-image-aws-lts-20-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-lts-18-04
  • ubuntu-upgrade-linux-image-azure-lts-20-04
  • ubuntu-upgrade-linux-image-dell300x
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-18-04
  • ubuntu-upgrade-linux-image-gcp-lts-20-04
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-64k
  • ubuntu-upgrade-linux-image-generic-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-5-4
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-5-4
  • 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-lowlatency-hwe-20-04
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-20-04b
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-18-04
  • ubuntu-upgrade-linux-image-oracle-lts-20-04
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-raspi-hwe-18-04
  • ubuntu-upgrade-linux-image-raspi-nolpae
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-16-04
  • ubuntu-upgrade-linux-image-virtual-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual-hwe-20-04

References

  • https://attackerkb.com/topics/cve-2021-22543
  • CVE - 2021-22543
  • CVE-2021-22543
  • USN-5070-1
  • USN-5071-1
  • USN-5071-2
  • USN-5071-3
  • USN-5073-1
  • USN-5073-2
  • USN-5073-3
  • USN-5091-1
  • USN-5091-2
  • USN-5092-1
  • USN-5092-2
  • USN-5094-1
  • USN-5094-2
  • USN-5096-1
  • USN-5106-1
  • USN-5113-1
  • USN-5114-1
  • USN-5115-1
  • USN-5116-1
  • USN-5116-2
  • USN-5117-1
  • USN-5120-1
  • USN-5135-1
  • USN-5136-1
  • USN-5137-1
  • USN-5137-2
  • USN-5210-1
  • USN-5299-1
  • USN-5343-1
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