CVE-2024-42093

Kernel crash via stack-allocated CPU mask

Published Jul 29, 2024 · Updated May 12, 2026

Stack overflow in the Linux dpaa2 Ethernet driver from 4.16 allows local users to crash the kernel under affected configurations. The update_xps function places an explicit CPU mask on the kernel stack instead of using cpumask_var allocation, so a large mask can exhaust stack space. Reachability requires the dpaa2 driver and CONFIG_CPUMASK_OFFSTACK=y; public sources do not identify the operation that reaches update_xps or demonstrate exploitation.

CVSS severity7.1
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in the Linux dpaa2 Ethernet driver from 4.16 allows local users to crash the kernel under affected configurations. The update_xps function places an explicit CPU mask on the kernel stack instead of using cpumask_var allocation, so a large mask can exhaust stack space. Reachability requires the dpaa2 driver and CONFIG_CPUMASK_OFFSTACK=y; public sources do not identify the operation that reaches update_xps or demonstrate exploitation.

The record

CVE
CVE-2024-42093
Published
Jul 29, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-20
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 29, 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=4.16; version=93ddf0b211a0a0367d01c9587169c16ed77b4b98 <48147337d7efdea6ad6e49f5b8eb894b95868ef0; version=93ddf0b211a0a0367d01c9587169c16ed77b4b98 <5e4f25091e6d06e99a23f724c839a58a8776a527; version=93ddf0b211a0a0367d01c9587169c16ed77b4b98 <69f49527aea12c23b78fb3d0a421950bf44fb4e2; version=93ddf0b211a0a0367d01c9587169c16ed77b4b98 <763896ab62a672d728f5eb10ac90d98c607a8509; version=93ddf0b211a0a0367d01c9587169c16ed77b4b98 <a55afc0f5f20ba30970aaf7271929dc00eee5e7d; version=93ddf0b211a0a0367d01c9587169c16ed77b4b98 <b2262b3be27cee334a2fa175ae3afb53f38fb0b1; version=93ddf0b211a0a0367d01c9587169c16ed77b4b98 <d33fe1714a44ff540629b149d8fab4ac6967585c
Siemens · SCALANCE XCM/XRM/XCH/XRH-300 familyversion=0 <V3.1
Siemens · RUGGEDCOM RST2428Pversion=0 <V3.1

Published CVSS scores

7.1Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-20Improper Input Validation

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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