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.
References
Link | Resource |
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https://bugs.chromium.org/p/project-zero/issues/detail?id=2222 | Exploit Mailing List Patch Third Party Advisory |
https://bugzilla.redhat.com/show_bug.cgi?id=2028584 | Issue Tracking Patch Third Party Advisory |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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Configuration 3 (hide)
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Configuration 4 (hide)
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History
01 Mar 2022, 01:13
Type | Values Removed | Values Added |
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CPE | cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
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CVSS |
v2 : v3 : |
v2 : 7.2
v3 : 8.8 |
References | (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=2028584 - Issue Tracking, Patch, Third Party Advisory | |
References | (MISC) https://bugs.chromium.org/p/project-zero/issues/detail?id=2222 - Exploit, Mailing List, Patch, Third Party Advisory | |
CWE | CWE-787 CWE-125 |
18 Feb 2022, 18:33
Type | Values Removed | Values Added |
---|---|---|
New CVE |
Information
Published : 2022-02-18 18:15
Updated : 2024-02-04 22:29
NVD link : CVE-2021-4093
Mitre link : CVE-2021-4093
CVE.ORG link : CVE-2021-4093
JSON object : View
Products Affected
redhat
- enterprise_linux
fedoraproject
- fedora
linux
- linux_kernel
canonical
- ubuntu_linux