CVE-2024-46745

Service degradation via unbounded uinput slot allocation

Published Sep 18, 2024 · Updated May 12, 2026

Uncontrolled resource consumption in Linux uinput allows local users to degrade service by requesting an excessive number of multitouch slots. The uinput setup path passes the unbounded slot count to input_mt_init_slots(), provoking a large allocation and costly memory reclamation. Access to the uinput interface is required; the request is rejected, but resulting memory pressure can impair system availability.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Linux uinput allows local users to degrade service by requesting an excessive number of multitouch slots. The uinput setup path passes the unbounded slot count to input_mt_init_slots(), provoking a large allocation and costly memory reclamation. Access to the uinput interface is required; the request is rejected, but resulting memory pressure can impair system availability.

The record

CVE
CVE-2024-46745
Published
Sep 18, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classifications
CWE-770, CWE-400, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=V3.1.0 <V3.1.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.0 <V3.1.5
Siemens · SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 familyversion=0 <V3.2
Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=2.6.36; version=38e7afe96c7c0ad900824911c61fdb04078033dc <206f533a0a7c683982af473079c4111f4a0f9f5e; version=38e7afe96c7c0ad900824911c61fdb04078033dc <51fa08edd80003db700bdaa099385c5900d27f4b; version=38e7afe96c7c0ad900824911c61fdb04078033dc <597ff930296c4c8fc6b6a536884d4f1a7187ec70; version=38e7afe96c7c0ad900824911c61fdb04078033dc <61df76619e270a46fd427fbdeb670ad491c42de2; version=38e7afe96c7c0ad900824911c61fdb04078033dc <9719687398dea8a6a12a10321a54dd75eec7ab2d; version=38e7afe96c7c0ad900824911c61fdb04078033dc <9c6d189f0c1c59ba9a32326ec82a0b367a3cd47b; version=38e7afe96c7c0ad900824911c61fdb04078033dc <a4858b00a1ec57043697fb935565fe267f161833; version=38e7afe96c7c0ad900824911c61fdb04078033dc <d76fc0f0b18d49b7e721c9e4975ef4bffde2f3e7
Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPversion=V3.1.0 <V3.1.5
Siemens · SCALANCE XCM/XRM/XCH/XRH-300 familyversion=0 <V3.2
Siemens · RUGGEDCOM RST2428Pversion=0 <V3.2
Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.0 <V3.1.5

Published CVSS scores

6.5Siemens ProductCERTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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

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-770Allocation of Resources Without Limits or Throttling
CWE-400Uncontrolled Resource Consumption
T1499.001OS Exhaustion Flood

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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