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 "int_ctl" field this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) 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. This flaw affects Linux kernel versions prior to 5.14-rc7.
| Reporter | Title | Published | Views | Family All 509 |
|---|---|---|---|---|
 | 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-2021-3653 | 29 Sep 202120:15 | – | 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-2021:3548) | 9 Feb 202200:00 | – | nessus |
| CentOS 8 : kernel (CESA-2021:3548) | 15 Sep 202100:00 | – | nessus |
| CentOS 7 : kernel (RHSA-2021:3801) | 17 Nov 202100:00 | – | nessus |
| Debian DLA-2843-1 : linux - LTS security update | 17 Dec 202100:00 | – | nessus |
10
Node
OR
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
16 Dec 2021 08:00Current
7High risk
Vulners AI Score7
CVSS 26.1
CVSS 3.18.8
EPSS0.00444