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 | Aug 18, 2025 |
Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
May 26, 2021
Added
Sep 9, 2021
Modified
Aug 18, 2025
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.
Solutions
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
NEW
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.