CVE-2024-45016

Local service interruption via netem queue miscount

Published Sep 11, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel netem allows local users to interrupt Linux and SIMATIC S7-1500 TM MFP systems via packet duplication. netem_enqueue() reports success after duplicated and original packets are dropped, incorrectly increments the parent qdisc queue length, and can leave a dangling pointer when qlen_notify() is skipped during destruction. Low-privileged local access and a netem qdisc configured for duplication with a classful parent such as DRR are required to reach the system-interrupting state.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel netem allows local users to interrupt Linux and SIMATIC S7-1500 TM MFP systems via packet duplication. netem_enqueue() reports success after duplicated and original packets are dropped, incorrectly increments the parent qdisc queue length, and can leave a dangling pointer when qlen_notify() is skipped during destruction. Low-privileged local access and a netem qdisc configured for duplication with a classful parent such as DRR are required to reach the system-interrupting state.

The record

CVE
CVE-2024-45016
Published
Sep 11, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 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=009510a90e230bb495f3fe25c7db956679263b07; version=0148fe458b5705e2fea7cb88294fed7e36066ca2; version=3.16.66 <3.17; version=4.14.106 <4.15; version=4.19.28 <4.20; version=4.20.15 <4.21; version=4.9.163 <4.10; version=4de7d30668cb8b06330992e1cd336f91700a2ce7; version=5.0; version=5845f706388a4cde0f6b80f9e5d33527e942b7d9 <0486d31dd8198e22b63a4730244b38fffce6d469; version=5845f706388a4cde0f6b80f9e5d33527e942b7d9 <52d99a69f3d556c6426048c9d481b912205919d8; version=5845f706388a4cde0f6b80f9e5d33527e942b7d9 <577d6c0619467fe90f7e8e57e45cb5bd9d936014; version=5845f706388a4cde0f6b80f9e5d33527e942b7d9 <759e3e8c4a6a6b4e52ebc4547123a457f0ce90d4; version=5845f706388a4cde0f6b80f9e5d33527e942b7d9 <c07ff8592d57ed258afee5a5e04991a48dbaf382; version=5845f706388a4cde0f6b80f9e5d33527e942b7d9 <c414000da1c2ea1ba9a5e5bb1a4ba774e51e202d; version=5845f706388a4cde0f6b80f9e5d33527e942b7d9 <e5bb2988a310667abed66c7d3ffa28880cf0f883; version=a550a01b8af856f2684b0f79d552f5119eb5006c; version=d1dd2e15c85e890a1cc9bde5ba07ae63331e5c73

Published CVSS scores

7.0Siemens ProductCERTCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS: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-416Use After Free
T1499.004Application or System Exploitation

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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