CVE-2024-50006

Local system hang via ext4 lock inversion

Published Oct 21, 2024 · Updated May 12, 2026

Deadlock in the ext4 migration path in Linux allows local users to hang an affected system through a racing migration ioctl. The ext4_ind_migrate() path retains i_data_sem while jbd2_journal_stop() can take jbd2_handle, reversing the order used by journal start. Reachability requires CONFIG_PROVE_LOCKING, an O_SYNC file descriptor, EXT4_IOC_MIGRATE, and a concurrent write; the reported consequence is a deadlock.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in the ext4 migration path in Linux allows local users to hang an affected system through a racing migration ioctl. The ext4_ind_migrate() path retains i_data_sem while jbd2_journal_stop() can take jbd2_handle, reversing the order used by journal start. Reachability requires CONFIG_PROVE_LOCKING, an O_SYNC file descriptor, EXT4_IOC_MIGRATE, and a concurrent write; the reported consequence is a deadlock.

The record

CVE
CVE-2024-50006
Published
Oct 21, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classifications
CWE-833, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 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=3.10; version=e8238f9a8339b3578c85e4192a7a23bc2bdc0333 <3c46d6060d3e38de22196c1fe7706c5a3c696285; version=e8238f9a8339b3578c85e4192a7a23bc2bdc0333 <4192adefc9c570698821c5eb9873320eac2fcbf1; version=e8238f9a8339b3578c85e4192a7a23bc2bdc0333 <53b1999cfd2c7addf2e581a32865fe8835467b44; version=e8238f9a8339b3578c85e4192a7a23bc2bdc0333 <6252cb6bde7fc76cb8dcb49d1def7c326b190820; version=e8238f9a8339b3578c85e4192a7a23bc2bdc0333 <9fedf51ab8cf7b69bff08f37fe0989fec7f5d870; version=e8238f9a8339b3578c85e4192a7a23bc2bdc0333 <cc749e61c011c255d81b192a822db650c68b313f; version=e8238f9a8339b3578c85e4192a7a23bc2bdc0333 <d43776b907659affef1de888525847d64b244194; version=e8238f9a8339b3578c85e4192a7a23bc2bdc0333 <d58a00e981d3118b91d503da263e640b7cde6729; version=e8238f9a8339b3578c85e4192a7a23bc2bdc0333 <ef05572da0c0eb89614ed01cc17d3c882bdbd1ff
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

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Oracle LinuxCVSS:3.1/AV:L/AC:H/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 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-833Deadlock
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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