CVE-2024-53170

Kernel fault via stale SCSI flush request

Published Dec 27, 2024 · Updated Sep 8, 2026

A use-after-free in Linux and Siemens MFP firmware allows local users to trigger a kernel fault during SCSI device probing. Queue destruction leaves a freed flush request in tags->rqs[] because blk_mq_clear_flush_rq_mapping() is skipped after QUEUE_FLAG_INIT_DONE is cleared. Reachability requires local low-privileged access and SCSI queue teardown while timeout work iterates request tags; published evidence demonstrates an invalid read but no reliable privilege-escalation path.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A use-after-free in Linux and Siemens MFP firmware allows local users to trigger a kernel fault during SCSI device probing. Queue destruction leaves a freed flush request in tags->rqs[] because blk_mq_clear_flush_rq_mapping() is skipped after QUEUE_FLAG_INIT_DONE is cleared. Reachability requires local low-privileged access and SCSI queue teardown while timeout work iterates request tags; published evidence demonstrates an invalid read but no reliable privilege-escalation path.

The record

CVE
CVE-2024-53170
Published
Dec 27, 2024
Updated
Sep 8, 2026
Vendor
Siemens
Product
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=V3.1.6 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.6 <*
The Linux Kernel Organization · Linuxversion=5.19; version=6cfeadbff3f8905f2854735ebb88e581402c16c4 <1364a29b71c7837770f1902c49e7a6e234d72c92; version=6cfeadbff3f8905f2854735ebb88e581402c16c4 <1921fe7d2836f8be1d321cf430d17e0d4e05301b; version=6cfeadbff3f8905f2854735ebb88e581402c16c4 <3802f73bd80766d70f319658f334754164075bc3; version=6cfeadbff3f8905f2854735ebb88e581402c16c4 <61092568f2a9acb0e6e186f03f2e0649a4e86d09; version=6cfeadbff3f8905f2854735ebb88e581402c16c4 <a0e93b9fefafe97d596f9c98701ae6c3b04b3ff6
Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPversion=V3.1.6 <*
Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.6 <*

Published CVSS scores

7.8CISA ADP VulnrichmentCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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