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CVE-2021-4093
HIGH8.8
Description
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.
CVE Details
CVSS v3.1 Score8.8
SeverityHIGH
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack VectorLOCAL
ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
Published2/18/2022
Last Modified11/21/2024
Sourcenvd
Honeypot Sightings0
Affected Products
canonical:ubuntu_linuxfedoraproject:fedoralinux:linux_kernelredhat:enterprise_linux
Weaknesses (CWE)
CWE-125CWE-125CWE-787
References
https://bugs.chromium.org/p/project-zero/issues/detail?id=2222(secalert@redhat.com)
https://bugzilla.redhat.com/show_bug.cgi?id=2028584(secalert@redhat.com)
https://bugs.chromium.org/p/project-zero/issues/detail?id=2222(af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=2028584(af854a3a-2127-422b-91ae-364da2661108)
IOC Correlations
No correlations recorded
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