CVE-2023-4155

A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`).

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2023-4155	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2213802	Issue Tracking Patch Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-4155	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2213802	Issue Tracking Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*

Configuration 3 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:37:::::::*
	cpe:2.3:o:fedoraproject:fedora:38:::::::*

History

21 Nov 2024, 08:34

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-09-13 17:15

Updated : 2024-11-21 08:34

NVD link : CVE-2023-4155

Mitre link : CVE-2023-4155

CVE.ORG link : CVE-2023-4155

JSON object : View

Products Affected

linux

linux_kernel

redhat

enterprise_linux

fedoraproject

fedora

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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