A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.
| Reporter | Title | Published | Views | Family All 196 |
|---|---|---|---|---|
 | CVE-2021-4093 | 18 Feb 202218:15 | – | attackerkb |
 | CVE-2021-4093 affecting package kernel 5.10.161.1-1 | 10 Mar 202223:47 | – | cbl_mariner |
 | Rocky Linux 8 [CIQ] Security Update: bpftool / bpftool-debuginfo / kernel / kernel-abi-stablelists / etc Multiple Vulnerabilities (crlsa-2022_1988) | 1 Oct 202600:00 | – | nessus |
| RHEL 8 : kernel-rt (RHSA-2022:1975) | 11 May 202200:00 | – | nessus |
| RHEL 8 : kernel (RHSA-2022:1988) | 11 May 202200:00 | – | nessus |
| Rocky Linux 8 : kernel (RLSA-2022:1988) | 18 May 202200:00 | – | nessus |
| Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5265-1) | 3 Feb 202200:00 | – | nessus |
| Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013285) | 21 Apr 202600:00 | – | nessus |
| Linux Distros Unpatched Vulnerability : CVE-2021-4093 | 12 Aug 202500:00 | – | nessus |
 | Linux kernel 缓冲区错误漏洞 | 3 Feb 202200:00 | – | cnnvd |
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01 Mar 2022 08:00Current
7.2High risk
Vulners AI Score7.2
CVSS 27.2
CVSS 3.18.8
EPSS0.00419