CVE-2023-40360Public exploit

Guest-triggered crash via unchecked endurance group pointer

Published Aug 14, 2023 · Updated Aug 2, 2024

NULL pointer dereference in QEMU 8.0.4 and earlier allows guest OS users to crash the emulator via a crafted NVMe directive. In hw/nvme/ctrl.c, nvme_directive_receive dereferences ns->endgrp to test Flexible Data Placement without first checking whether the endurance group exists. Triggering the crash requires guest access to an emulated NVMe controller with no endurance group configured, interrupting that virtual machine's QEMU process.

CVSS severity5.5
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in QEMU 8.0.4 and earlier allows guest OS users to crash the emulator via a crafted NVMe directive. In hw/nvme/ctrl.c, nvme_directive_receive dereferences ns->endgrp to test Flexible Data Placement without first checking whether the endurance group exists. Triggering the crash requires guest access to an emulated NVMe controller with no endurance group configured, interrupting that virtual machine's QEMU process.

The record

CVE
CVE-2023-40360
Published
Aug 14, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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