CVE-2024-43828

System hang via uninitialized extent replay state

Published Aug 17, 2024 · Updated May 12, 2026

Denial of service in the Linux ext4 filesystem allows local users to hang a system during fast-commit journal replay. The ext4_ext_determine_insert_hole() replay path calls ext4_es_find_extent_range(), which returns without initializing an extent_status structure; garbage data then overflows an integer and prevents loop termination. Reachability requires local low-privileged access and an ext4 filesystem undergoing fast-commit replay; the demonstrated consequence is a persistent service interruption.

CVSS severity5.5
Medium
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

Denial of service in the Linux ext4 filesystem allows local users to hang a system during fast-commit journal replay. The ext4_ext_determine_insert_hole() replay path calls ext4_es_find_extent_range(), which returns without initializing an extent_status structure; garbage data then overflows an integer and prevents loop termination. Reachability requires local low-privileged access and an ext4 filesystem undergoing fast-commit replay; the demonstrated consequence is a persistent service interruption.

The record

CVE
CVE-2024-43828
Published
Aug 17, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-835, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 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=5.10; version=8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 <0619f7750f2b178a1309808832ab20d85e0ad121; version=8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 <181e63cd595c688194e07332f9944b3a63193de2; version=8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 <5ed0496e383cb6de120e56991385dce70bbb87c1; version=8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 <81f819c537d29932e4b9267f02411cbc8b355178; version=8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 <907c3fe532253a6ef4eb9c4d67efb71fab58c706; version=8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 <c6e67df64783e99a657ef2b8c834ba2bf54c539c

Published CVSS scores

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.

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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-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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