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`).
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 |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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Configuration 3 (hide)
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History
19 Sep 2023, 17:18
| Type | Values Removed | Values Added |
|---|---|---|
| References | (MISC) https://access.redhat.com/security/cve/CVE-2023-4155 - Third Party Advisory | |
| References | (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=2213802 - Issue Tracking, Patch, Third Party Advisory | |
| CWE | CWE-367 | |
| First Time |
Fedoraproject
Linux Linux linux Kernel Fedoraproject fedora Redhat Redhat enterprise Linux |
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| CPE | cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |
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| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.6 |
13 Sep 2023, 17:27
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2023-09-13 17:15
Updated : 2023-12-10 15:14
NVD link : CVE-2023-4155
Mitre link : CVE-2023-4155
CVE.ORG link : CVE-2023-4155
JSON object : View
Products Affected
fedoraproject
- fedora
linux
- linux_kernel
redhat
- enterprise_linux
CWE
CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition