CVE-2024-47809

Local service crash via unassigned DLM resource

Published Jan 11, 2025 · Updated Sep 8, 2026

NULL pointer dereference in Linux DLM allows local users to crash an affected system through a newly created lock request. During DLM request_lock() error logging, code dereferences lkb->lkb_resource before validate_lock_args() has attached a resource and treats an arbitrary resource-name byte array as printable text. Reachability requires low-privilege local access, a newly created lock block without an assigned resource, and the relevant debug logging path; no data disclosure or modification is reported.

CVSS severity5.5
Medium
EPSS probability0.23%
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 DLM allows local users to crash an affected system through a newly created lock request. During DLM request_lock() error logging, code dereferences lkb->lkb_resource before validate_lock_args() has attached a resource and treats an arbitrary resource-name byte array as printable text. Reachability requires low-privilege local access, a newly created lock block without an assigned resource, and the relevant debug logging path; no data disclosure or modification is reported.

The record

CVE
CVE-2024-47809
Published
Jan 11, 2025
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. Jan 11, 2025CVE 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=2.6.30; version=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <2db11504ef82a60c1a2063ba7431a5cd013ecfcb; version=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <6fbdc3980b70e9c1c86eccea7d5ee68108008fa7; version=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <8d55ce46dd543c6965970ce70c22c3076dd35b1e; version=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <b98333c67daf887c724cd692e88e2db9418c0861; version=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <e1ffea6bec96d4349dbfcc42ad3e436259f64243
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

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

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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
T1499Endpoint Denial of Service

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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