CVE-2024-40960

Kernel crash via unchecked IPv6 device lookup

Published Jul 12, 2024 · Updated May 12, 2026

NULL pointer dereference in Linux 2.6.17 and later allows local users to crash the kernel through the IPv6 route lookup path. rt6_probe() dereferences the result of __in6_dev_get() without first checking whether the device lookup returned NULL. A low-privileged local account must reach that routing path; successful exploitation interrupts the entire host or embedded device.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux 2.6.17 and later allows local users to crash the kernel through the IPv6 route lookup path. rt6_probe() dereferences the result of __in6_dev_get() without first checking whether the device lookup returned NULL. A low-privileged local account must reach that routing path; successful exploitation interrupts the entire host or embedded device.

The record

CVE
CVE-2024-40960
Published
Jul 12, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 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=2.6.17; version=52e1635631b342803aecaf81a362c1464e3da2e5 <1ed9849fdf9a1a617129346b11d2094ca26828dc; version=52e1635631b342803aecaf81a362c1464e3da2e5 <51ee2f7c30790799d0ec30c0ce0c743e58f046f2; version=52e1635631b342803aecaf81a362c1464e3da2e5 <569c9d9ea6648d099187527b93982f406ddcebc0; version=52e1635631b342803aecaf81a362c1464e3da2e5 <6eed6d3cd19ff3cfa83aeceed86da14abaf7417b; version=52e1635631b342803aecaf81a362c1464e3da2e5 <73e7c8ca6ad76f29b2c99c20845a6f3b203ff0c6; version=52e1635631b342803aecaf81a362c1464e3da2e5 <b86762dbe19a62e785c189f313cda5b989931f37; version=52e1635631b342803aecaf81a362c1464e3da2e5 <d66fc4826127c82f99c4033380f8e93833d331c7; version=52e1635631b342803aecaf81a362c1464e3da2e5 <f0cda984e4e634b221dbf9642b8ecc5b4806b41e
Siemens · SCALANCE XCM/XRM/XCH/XRH-300 familyversion=0 <V3.1
Siemens · RUGGEDCOM RST2428Pversion=0 <V3.1

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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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