A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "virt_ext" field this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result the L2 guest would be allowed to read/write physical pages of the host resulting in a crash of the entire system leak of sensitive data or potential guest-to-host escape.
| Reporter | Title | Published | Views | Family All 452 |
|---|---|---|---|---|
 | Security Bulletin: Multiple vulnerabilities in Linux Kernel affect IBM QRadar SIEM (CVE-2021-22543, CVE-2021-3653, CVE-2021-3656, CVE-2021-37576) | 28 Apr 202220:56 | – | ibm |
 | CVE-2021-3656 | 4 Mar 202219:15 | – | attackerkb |
 | Amazon Linux 2 : kernel (ALAS-2021-1704) | 16 Sep 202100:00 | – | nessus |
| Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-005) | 2 May 202200:00 | – | nessus |
| Amazon Linux 2 : microvm-kernel (ALASMICROVM-KERNEL-4.14-2023-002) | 27 Sep 202300:00 | – | nessus |
| Amazon Linux 2 : microvm-kernel (ALASMICROVM-KERNEL-4.14-2023-003) | 27 Sep 202300:00 | – | nessus |
| AlmaLinux 8 : kernel (ALSA-2021:4056) | 9 Feb 202200:00 | – | nessus |
| CentOS 8 : kernel (CESA-2021:4056) | 3 Nov 202100:00 | – | nessus |
| CentOS 7 : kernel (RHSA-2021:3801) | 17 Nov 202100:00 | – | nessus |
| Debian DSA-4978-1 : linux - security update | 25 Sep 202100:00 | – | nessus |
10
Node
Data
Build on a solid foundation with Vulners data
We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data
Api
Power your application with Vulners API
The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access
App
Assess and manage vulnerabilities with Vulners tools
Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation
11 Mar 2022 08:00Current
7.2High risk
Vulners AI Score7.2
CVSS 27.2
CVSS 3.18.8
EPSS0.00658