CVE-2024-35813

System crash via negative MMC array index

Published May 17, 2024 · Updated Aug 5, 2026

Improper array-index validation in the Linux MMC core allows local users to crash affected systems through a crafted FFU request. In drivers/mmc/core/block.c, the close-ended firmware-update path reads the preceding idatas element before confirming that the current array position is greater than zero, causing the initial iteration to access memory before the array. Access requires a local low-privileged account and a reachable MMC firmware-update interface; the documented consequence is a kernel crash with no confidentiality or integrity impact.

CVSS severity5.5
Medium
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

Improper array-index validation in the Linux MMC core allows local users to crash affected systems through a crafted FFU request. In drivers/mmc/core/block.c, the close-ended firmware-update path reads the preceding idatas element before confirming that the current array position is greater than zero, causing the initial iteration to access memory before the array. Access requires a local low-privileged account and a reachable MMC firmware-update interface; the documented consequence is a kernel crash with no confidentiality or integrity impact.

The record

CVE
CVE-2024-35813
Published
May 17, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-129, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=1653a8102868264f3488c298a9f20af2add9a288 <4466677dcabe2d70de6aa3d4bd4a4fafa94a71f2; version=4d0c8d0aef6355660b6775d57ccd5d4ea2e15802 <7d0e8a6147550aa058fa6ade8583ad252aa61304; version=4d0c8d0aef6355660b6775d57ccd5d4ea2e15802 <cf55a7acd1ed38afe43bba1c8a0935b51d1dc014; version=50b8b7a22e90bab9f1949b64a88ff17ab10913ec <81b8645feca08a54c7c4bf36e7b176f4983b2f28; version=5.10.210 <5.10.215; version=5.15.149 <5.15.154; version=5.4.269 <5.4.274; version=59020bf0999ff7da8aedcd00ef8f0d75d93b6d20 <2b539c88940e22494da80a93ee1c5a28bbad10f6; version=6.1.76 <6.1.84; version=6.6.15 <6.6.24; version=6.7.3 <6.7.12; version=6.8; version=c4edcd134bb72b3b0acc884612d624e48c9d057f <ad9cc5e9e53ab94aa0c7ac65d43be7eb208dcb55; version=eed9119f8f8e8fbf225c08abdbb58597fba807e0 <064db53f9023a2d5877a2d12de6bc27995f6ca56; version=f49f9e802785291149bdc9c824414de4604226b4 <b9a7339ae403035ffe7fc37cb034b36947910f68

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.

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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-129Improper Validation of Array Index
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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