What is CVE-2023-4155?

CVE-2023-4155 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.6 out of 10. CVE-2023-4155 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-4155?

CVE-2023-4155 has a CVSS score of 5.6 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H.

Is there a patch available for CVE-2023-4155?

No patch is currently available for CVE-2023-4155. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-4155 actively exploited?

CVE-2023-4155 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-4155

Medium

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`).

Package Linux Kernel

Published 2023-09-13

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.6

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

Weakness type

CWE-367

CVE-2023-4155 is classified as CWE-367

See CWE-367 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2023-4155 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://access.redhat.com/security/cve/CVE-2023-4155

Third Party Advisory
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=2213802
Patch

Details

CVE ID CVE-2023-4155

Severity Medium

CVSS score 5.6 / 10

CVSS version 3.1

Published 2023-09-13

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-4155?

CVE-2023-4155 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.6 out of 10 . CVE-2023-4155 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-4155?

CVE-2023-4155 has a CVSS score of 5.6 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H.
Is there a patch available for CVE-2023-4155?

No patch is currently available for CVE-2023-4155. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-4155 actively exploited?

No — CVE-2023-4155 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.