vulnerability
Ubuntu: (Multiple Advisories) (CVE-2021-22543): Linux kernel vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:N/C:P/I:P/A:P) | May 26, 2021 | Sep 9, 2021 | Mar 22, 2023 |
Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
May 26, 2021
Added
Sep 9, 2021
Modified
Mar 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-dell300xubuntu-upgrade-linux-image-4-15-0-1081-oracleubuntu-upgrade-linux-image-4-15-0-1096-raspi2ubuntu-upgrade-linux-image-4-15-0-1100-kvmubuntu-upgrade-linux-image-4-15-0-1109-gcpubuntu-upgrade-linux-image-4-15-0-1112-awsubuntu-upgrade-linux-image-4-15-0-1113-snapdragonubuntu-upgrade-linux-image-4-15-0-1124-azureubuntu-upgrade-linux-image-4-15-0-159-genericubuntu-upgrade-linux-image-4-15-0-159-generic-lpaeubuntu-upgrade-linux-image-4-15-0-159-lowlatencyubuntu-upgrade-linux-image-5-10-0-1049-oemubuntu-upgrade-linux-image-5-11-0-1015-azureubuntu-upgrade-linux-image-5-11-0-1015-kvmubuntu-upgrade-linux-image-5-11-0-1017-awsubuntu-upgrade-linux-image-5-11-0-1017-oracleubuntu-upgrade-linux-image-5-11-0-1017-raspiubuntu-upgrade-linux-image-5-11-0-1017-raspi-nolpaeubuntu-upgrade-linux-image-5-11-0-1018-gcpubuntu-upgrade-linux-image-5-11-0-34-genericubuntu-upgrade-linux-image-5-11-0-34-generic-64kubuntu-upgrade-linux-image-5-11-0-34-generic-lpaeubuntu-upgrade-linux-image-5-11-0-34-lowlatencyubuntu-upgrade-linux-image-5-4-0-1023-gkeopubuntu-upgrade-linux-image-5-4-0-1043-raspiubuntu-upgrade-linux-image-5-4-0-1046-kvmubuntu-upgrade-linux-image-5-4-0-1052-gcpubuntu-upgrade-linux-image-5-4-0-1052-gkeubuntu-upgrade-linux-image-5-4-0-1054-oracleubuntu-upgrade-linux-image-5-4-0-1056-awsubuntu-upgrade-linux-image-5-4-0-1058-azureubuntu-upgrade-linux-image-5-4-0-84-genericubuntu-upgrade-linux-image-5-4-0-84-generic-lpaeubuntu-upgrade-linux-image-5-4-0-84-lowlatencyubuntu-upgrade-linux-image-5-8-0-1043-azureubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-hweubuntu-upgrade-linux-image-aws-lts-18-04ubuntu-upgrade-linux-image-aws-lts-20-04ubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-lts-18-04ubuntu-upgrade-linux-image-azure-lts-20-04ubuntu-upgrade-linux-image-dell300xubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-gcp-lts-18-04ubuntu-upgrade-linux-image-gcp-lts-20-04ubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-hwe-20-04ubuntu-upgrade-linux-image-generic-hwe-16-04ubuntu-upgrade-linux-image-generic-hwe-18-04ubuntu-upgrade-linux-image-generic-hwe-20-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-generic-lpae-hwe-18-04ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04ubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-gke-5-4ubuntu-upgrade-linux-image-gkeopubuntu-upgrade-linux-image-gkeop-5-4ubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-hwe-16-04ubuntu-upgrade-linux-image-lowlatency-hwe-18-04ubuntu-upgrade-linux-image-lowlatency-hwe-20-04ubuntu-upgrade-linux-image-oemubuntu-upgrade-linux-image-oem-20-04ubuntu-upgrade-linux-image-oem-20-04bubuntu-upgrade-linux-image-oem-osp1ubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-lts-18-04ubuntu-upgrade-linux-image-oracle-lts-20-04ubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-raspi-hwe-18-04ubuntu-upgrade-linux-image-raspi-nolpaeubuntu-upgrade-linux-image-raspi2ubuntu-upgrade-linux-image-snapdragonubuntu-upgrade-linux-image-snapdragon-hwe-18-04ubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-16-04ubuntu-upgrade-linux-image-virtual-hwe-18-04ubuntu-upgrade-linux-image-virtual-hwe-20-04
References
- CVE-2021-22543
- https://attackerkb.com/topics/CVE-2021-22543
- NVD-CVE-2021-22543
- UBUNTU-USN-5070-1
- UBUNTU-USN-5071-1
- UBUNTU-USN-5071-2
- UBUNTU-USN-5071-3
- UBUNTU-USN-5073-1
- UBUNTU-USN-5073-2
- UBUNTU-USN-5073-3
- UBUNTU-USN-5091-1
- UBUNTU-USN-5091-2
- UBUNTU-USN-5092-1
- UBUNTU-USN-5092-2
- UBUNTU-USN-5094-1
- UBUNTU-USN-5094-2
- UBUNTU-USN-5096-1
- UBUNTU-USN-5106-1
- UBUNTU-USN-5113-1
- UBUNTU-USN-5114-1
- UBUNTU-USN-5115-1
- UBUNTU-USN-5116-1
- UBUNTU-USN-5116-2
- UBUNTU-USN-5117-1
- UBUNTU-USN-5120-1
- UBUNTU-USN-5135-1
- UBUNTU-USN-5136-1
- UBUNTU-USN-5137-1
- UBUNTU-USN-5137-2
- UBUNTU-USN-5210-1
- UBUNTU-USN-5299-1
- UBUNTU-USN-5343-1
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