CVE-2024-42276

Local system crash via unmapped NVMe request

Published Aug 17, 2024 · Updated Aug 5, 2026

A NULL pointer dereference in the Linux kernel NVMe PCI driver allows local users to crash affected systems during request cleanup. nvme_unmap_data() attempts to unmap request data even when no data mapping exists because the request has no physical segments, causing an invalid dereference. Exploitation requires local access to the affected NVMe request path; the documented consequence is an availability-only service interruption.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL pointer dereference in the Linux kernel NVMe PCI driver allows local users to crash affected systems during request cleanup. nvme_unmap_data() attempts to unmap request data even when no data mapping exists because the request has no physical segments, causing an invalid dereference. Exploitation requires local access to the affected NVMe request path; the documented consequence is an availability-only service interruption.

The record

CVE
CVE-2024-42276
Published
Aug 17, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=4aedb705437f6f98b45f45c394e6803ca67abd33 <3f8ec1d6b0ebd8268307d52be8301973fa5a01ec; version=4aedb705437f6f98b45f45c394e6803ca67abd33 <70100fe721840bf6d8e5abd25b8bffe4d2e049b7; version=4aedb705437f6f98b45f45c394e6803ca67abd33 <77848b379e9f85a08048a2c8b3b4a7e8396f5f83; version=4aedb705437f6f98b45f45c394e6803ca67abd33 <7cc1f4cd90a00b6191cb8cda2d1302fdce59361c; version=4aedb705437f6f98b45f45c394e6803ca67abd33 <be23ae63080e0bf9e246ab20207200bca6585eba; version=4aedb705437f6f98b45f45c394e6803ca67abd33 <c31fad1470389666ac7169fe43aa65bf5b7e2cfd; version=4aedb705437f6f98b45f45c394e6803ca67abd33 <d135c3352f7c947a922da93c8e763ee6bc208b64; version=5.2

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.4Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:H/UI:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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