arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass access control on host OS MSRs when there are nested guests aka CID-a58d9166a756. This occurs because of a TOCTOU race condition associated with a VMCB12 double fetch in nested_svm_vmrun.
| Reporter | Title | Published | Views | Family All 71 |
|---|---|---|---|---|
 | CVE-2021-29657 | 22 Jul 202117:15 | – | attackerkb |
 | Linux arch/x86/kvm/svm/nested.c Use-After-Free Privilege Escalation | 5 Oct 202100:00 | – | bdu_fstec |
 | CVE-2021-29657 affecting package kernel 5.10.189.1-1 | 9 Sep 202115:03 | – | cbl_mariner |
| CVE-2021-29657 affecting package kernel for versions less than 5.10.78.1-1 | 9 Apr 202206:52 | – | cbl_mariner |
 | CVE-2021-29657 | 16 Dec 202207:26 | – | circl |
 | Linux Kernel Security Vulnerabilities | 7 Apr 202100:00 | – | cnnvd |
 | Linux kernel security bypass vulnerability (CNVD-2021-60525) | 23 Jul 202100:00 | – | cnvd |
 | CVE-2021-29657 | 22 Jul 202116:44 | – | cve |
 | CVE-2021-29657 | 22 Jul 202116:44 | – | cvelist |
 | CVE-2021-29657 | 22 Jul 202116:44 | – | debiancve |
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 26.9
CVSS 3.17.4
EPSS0.00416