CVE-2024-23848Public exploit

System crash via concurrent CEC handle release

Published Jan 23, 2024 · Updated May 12, 2026

Use-after-free in Siemens SIMATIC S7-1500 TM MFP GNU/Linux subsystem allows local users to crash the system through CEC ioctls. cec_release frees a cec_fh while another thread can retain its lock and later append a message through cec_queue_msg_fh, accessing the freed fh->msgs list. Low-privileged access to the CEC device and a concurrent close-and-transmit sequence are required; the published impact is a system crash.

CVSS severity7.5
High
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

Use-after-free in Siemens SIMATIC S7-1500 TM MFP GNU/Linux subsystem allows local users to crash the system through CEC ioctls. cec_release frees a cec_fh while another thread can retain its lock and later append a message through cec_queue_msg_fh, accessing the freed fh->msgs list. Low-privileged access to the CEC device and a concurrent close-and-transmit sequence are required; the published impact is a system crash.

The record

CVE
CVE-2024-23848
Published
Jan 23, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 23, 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?

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  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 <*

Published CVSS scores

7.5Siemens ProductCERTCVSS:3.1/AV:N/AC:L/PR:N/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 exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

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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