CVE-2024-43890

CPU hang via tracing-map element-counter overflow

Published Aug 26, 2024 · Updated May 12, 2026

Integer overflow in Linux kernel tracing_map handling since 4.7 allows local users to hang a CPU through crafted tracing-map insertions. get_free_elt() increments next_elt until it wraps, permitting a full tracing_map; __tracing_map_insert() then loops forever with preemption disabled. Local low-privileged access and a trace-map consumer able to drive repeated element creation are required, and the documented consequence is an availability-only CPU hang.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux kernel tracing_map handling since 4.7 allows local users to hang a CPU through crafted tracing-map insertions. get_free_elt() increments next_elt until it wraps, permitting a full tracing_map; __tracing_map_insert() then loops forever with preemption disabled. Local low-privileged access and a trace-map consumer able to drive repeated element creation are required, and the documented consequence is an availability-only CPU hang.

The record

CVE
CVE-2024-43890
Published
Aug 26, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-190, CWE-20, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=08d43a5fa063e03c860f2f391a30c388bcbc948e <236bb4690773ab6869b40bedc7bc8d889e36f9d6; version=08d43a5fa063e03c860f2f391a30c388bcbc948e <302ceb625d7b990db205a15e371f9a71238de91c; version=08d43a5fa063e03c860f2f391a30c388bcbc948e <788ea62499b3c18541fd6d621964d8fafbc4aec5; version=08d43a5fa063e03c860f2f391a30c388bcbc948e <a172c7b22bc2feaf489cfc6d6865f7237134fdf8; version=08d43a5fa063e03c860f2f391a30c388bcbc948e <bcf86c01ca4676316557dd482c8416ece8c2e143; version=08d43a5fa063e03c860f2f391a30c388bcbc948e <cd10d186a5409a1fe6e976df82858e9773a698da; version=08d43a5fa063e03c860f2f391a30c388bcbc948e <d3e4dbc2858fe85d1dbd2e72a9fc5dea988b5c18; version=08d43a5fa063e03c860f2f391a30c388bcbc948e <eb223bf01e688dfe37e813c8988ee11c8c9f8d0a; version=4.7
Siemens · SCALANCE XCM/XRM/XCH/XRH-300 familyversion=0 <V3.1
Siemens · RUGGEDCOM RST2428Pversion=0 <V3.1

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

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-190Integer Overflow or Wraparound
CWE-20Improper Input Validation
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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