CVE-2024-49998

Service interruption via DSA shutdown race

Published Oct 21, 2024 · Updated Sep 8, 2026

Null pointer dereference in Linux and affected Siemens MFP firmware allows local users to crash systems during DSA shutdown. The DSA shutdown path clears driver data and conduit->dsa_ptr without first stopping the PHY state machine or quiescing concurrent packet reception, enabling null dereferences. Reachability requires local low-privileged access, DSA switch use, and a shutdown race; the documented consequence is a kernel crash.

CVSS severity4.7
Medium
EPSS probability0.17%
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 Linux and affected Siemens MFP firmware allows local users to crash systems during DSA shutdown. The DSA shutdown path clears driver data and conduit->dsa_ptr without first stopping the PHY state machine or quiescing concurrent packet reception, enabling null dereferences. Reachability requires local low-privileged access, DSA switch use, and a shutdown race; the documented consequence is a kernel crash.

The record

CVE
CVE-2024-49998
Published
Oct 21, 2024
Updated
Sep 8, 2026
Vendor
Siemens
Product
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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=V3.1.5 <*
  2. Affected versionversion=V3.1.6 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.5 <*; version=V3.1.6 <*
The Linux Kernel Organization · Linuxversion=5.15.155 <5.15.176; version=5.16.10 <5.17; version=5.17; version=89b60402d43cdab4387dbbf24afebda5cf092ae7; version=ee534378f00561207656663d93907583958339ae <2e93bf719462ac6d23c881c8b93e5dc9bf5ab7f5; version=ee534378f00561207656663d93907583958339ae <6c24a03a61a245fe34d47582898331fa034b6ccd; version=ee534378f00561207656663d93907583958339ae <ab5d3420a1120950703dbdc33698b28a6ebc3d23; version=ee534378f00561207656663d93907583958339ae <ab9e90619b6339becc5415647ae154a9a46a044d; version=ee534378f00561207656663d93907583958339ae <b4a65d479213fe84ecb14e328271251eebe69492; version=ff45899e732e57088985e3a497b1d9100571c0f5 <87bd909a7014e32790e8c759d5b7694a95778ca5
Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPversion=V3.1.5 <*; version=V3.1.6 <*
Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.5 <*; version=V3.1.6 <*

Published CVSS scores

4.7Siemens ProductCERTCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7UbuntuCVSS:3.1/AV:L/AC:H/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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