CVE-2021-22543high
New! CVE Severity Now Using CVSS v3
The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
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.
References
https://github.com/google/security-research/security/advisories/GHSA-7wq5-phmq-m584
http://www.openwall.com/lists/oss-security/2021/06/26/1
https://security.netapp.com/advisory/ntap-20210708-0002/
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
Details
Source: MITRE
Published: 2021-05-26
Updated: 2021-11-12
Type: CWE-119
Risk Information
CVSS v2
Base Score: 4.6
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.9
Severity: MEDIUM
CVSS v3
Base Score: 7.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1.8
Severity: HIGH
Vulnerable Software
Configuration 1
OR
Configuration 2
OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Configuration 3
OR
cpe:2.3:a:netapp:hci_baseboard_management_controller:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:*
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 155547 | CentOS 7 : kernel (CESA-2021:3801) | Nessus | CentOS Local Security Checks | high |
| 154668 | RHEL 7 : kernel (RHSA-2021:3987) | Nessus | Red Hat Local Security Checks | high |
| 154666 | RHEL 7 : kpatch-patch (RHSA-2021:4000) | Nessus | Red Hat Local Security Checks | high |
| 154338 | Ubuntu 20.04 LTS : Linux kernel (Azure) vulnerabilities (USN-5120-1) | Nessus | Ubuntu Local Security Checks | high |
| 154335 | RHEL 7 : RHV-H security update (redhat-virtualization-host) 4.3.19 (Moderate) (RHSA-2021:3943) | Nessus | Red Hat Local Security Checks | high |
| 154132 | Scientific Linux Security Update : kernel on SL7.x x86_64 (2021:3801) | Nessus | Scientific Linux Local Security Checks | high |
| 154097 | Oracle Linux 7 : kernel (ELSA-2021-3801) | Nessus | Oracle Linux Local Security Checks | high |
| 154086 | RHEL 7 : kernel (RHSA-2021:3767) | Nessus | Red Hat Local Security Checks | high |
| 154072 | RHEL 7 : kpatch-patch (RHSA-2021:3768) | Nessus | Red Hat Local Security Checks | high |
| 154070 | RHEL 7 : kpatch-patch (RHSA-2021:3814) | Nessus | Red Hat Local Security Checks | high |
| 154048 | RHEL 7 : kernel (RHSA-2021:3812) | Nessus | Red Hat Local Security Checks | high |
| 154047 | RHEL 7 : kernel-rt (RHSA-2021:3802) | Nessus | Red Hat Local Security Checks | high |
| 154046 | RHEL 7 : kernel (RHSA-2021:3801) | Nessus | Red Hat Local Security Checks | high |
| 154018 | RHEL 7 : kernel (RHSA-2021:3766) | Nessus | Red Hat Local Security Checks | high |
| 153908 | Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5106-1) | Nessus | Ubuntu Local Security Checks | high |
| 153873 | RHEL 7 : kernel (RHSA-2021:3725) | Nessus | Red Hat Local Security Checks | high |
| 153860 | Amazon Linux AMI : kernel (ALAS-2021-1539) | Nessus | Amazon Linux Local Security Checks | high |
| 153802 | Ubuntu 18.04 LTS : Linux kernel (Raspberry Pi) vulnerabilities (USN-5094-2) | Nessus | Ubuntu Local Security Checks | medium |
| 153797 | Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-5094-1) | Nessus | Ubuntu Local Security Checks | high |
| 153786 | Amazon Linux 2 : kernel (ALAS-2021-1699) | Nessus | Amazon Linux Local Security Checks | high |
| 153526 | Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel (Raspberry Pi) vulnerabilities (USN-5071-3) | Nessus | Ubuntu Local Security Checks | high |
| 153499 | Photon OS 3.0: Linux PHSA-2021-3.0-0302 | Nessus | PhotonOS Local Security Checks | medium |
| 153445 | Ubuntu 18.04 LTS : Linux kernel (HWE) vulnerabilities (USN-5071-2) | Nessus | Ubuntu Local Security Checks | high |
| 153443 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9451) | Nessus | Oracle Linux Local Security Checks | medium |
| 153442 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9450) | Nessus | Oracle Linux Local Security Checks | medium |
| 153178 | Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5071-1) | Nessus | Ubuntu Local Security Checks | high |
| 153174 | Ubuntu 20.04 LTS / 21.04 : Linux kernel vulnerabilities (USN-5070-1) | Nessus | Ubuntu Local Security Checks | high |
| 153042 | Photon OS 2.0: Linux PHSA-2021-2.0-0387 | Nessus | PhotonOS Local Security Checks | high |
| 152940 | RHEL 8 : kpatch-patch (RHSA-2021:3380) | Nessus | Red Hat Local Security Checks | high |
| 152931 | RHEL 8 : kernel-rt (RHSA-2021:3375) | Nessus | Red Hat Local Security Checks | high |
| 152925 | RHEL 8 : kernel (RHSA-2021:3363) | Nessus | Red Hat Local Security Checks | high |
| 152688 | RHEL 8 : Red Hat Virtualization Host security and bug fix update [ovirt-4.4.7] (Important) (RHSA-2021:3235) | Nessus | Red Hat Local Security Checks | high |
| 152652 | SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 16 for SLE 15 SP2) (SUSE-SU-2021:2746-1) | Nessus | SuSE Local Security Checks | high |
| 152648 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:2756-1) | Nessus | SuSE Local Security Checks | high |
| 152643 | SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 17 for SLE 15 SP2) (SUSE-SU-2021:2695-1) | Nessus | SuSE Local Security Checks | high |
| 152619 | RHEL 8 : kpatch-patch (RHSA-2021:3181) | Nessus | Red Hat Local Security Checks | high |
| 152613 | RHEL 8 : kernel (RHSA-2021:3173) | Nessus | Red Hat Local Security Checks | high |
| 152596 | CentOS 8 : kernel (CESA-2021:3057) | Nessus | CentOS Local Security Checks | high |
| 152569 | openSUSE 15 Security Update : kernel (openSUSE-SU-2021:2687-1) | Nessus | SuSE Local Security Checks | high |
| 152566 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:2687-1) | Nessus | SuSE Local Security Checks | high |
| 152545 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2678-1) | Nessus | SuSE Local Security Checks | high |
| 152493 | Oracle Linux 8 : kernel (ELSA-2021-3057) | Nessus | Oracle Linux Local Security Checks | high |
| 152481 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2643-1) | Nessus | SuSE Local Security Checks | high |
| 152480 | SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2021:2647-1) | Nessus | SuSE Local Security Checks | high |
| 152479 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2646-1) | Nessus | SuSE Local Security Checks | high |
| 152478 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2645-1) | Nessus | SuSE Local Security Checks | high |
| 152475 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2644-1) | Nessus | SuSE Local Security Checks | high |
| 152467 | openSUSE 15 Security Update : kernel (openSUSE-SU-2021:1142-1) | Nessus | SuSE Local Security Checks | high |
| 152459 | openSUSE 15 Security Update : kernel (openSUSE-SU-2021:2645-1) | Nessus | SuSE Local Security Checks | high |
| 152444 | RHEL 8 : kpatch-patch (RHSA-2021:3044) | Nessus | Red Hat Local Security Checks | high |
| 152441 | RHEL 8 : kernel-rt (RHSA-2021:3088) | Nessus | Red Hat Local Security Checks | high |
| 152438 | RHEL 8 : kernel (RHSA-2021:3057) | Nessus | Red Hat Local Security Checks | high |