CVE-2024-35899

Kernel compromise via nf_tables teardown race

Published May 19, 2024 · Updated Aug 5, 2026

Use-after-free in nf_tables in affected Linux kernels allows local users to crash or compromise the kernel during module removal. The exit path releases an nftables set before nf_tables_trans_destroy_work finishes processing an element that still references it. A local user can prime the destroy queue through nftables batches, but a privileged user or automation must unload the module for the race to fire.

CVSS severity7.3
High
EPSS probability0.20%
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 nf_tables in affected Linux kernels allows local users to crash or compromise the kernel during module removal. The exit path releases an nftables set before nf_tables_trans_destroy_work finishes processing an element that still references it. A local user can prime the destroy queue through nftables batches, but a privileged user or automation must unload the module for the race to fire.

The record

CVE
CVE-2024-35899
Published
May 19, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-362, T1499.004, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 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=0935d558840099b3679c67bb7468dc78fcbad940 <24cea9677025e0de419989ecb692acd4bb34cac2; version=0935d558840099b3679c67bb7468dc78fcbad940 <333b5085522cf1898d5a0d92616046b414f631a7; version=0935d558840099b3679c67bb7468dc78fcbad940 <46c4481938e2ca62343b16ea83ab28f4c1733d31; version=0935d558840099b3679c67bb7468dc78fcbad940 <4e8447a9a3d367b5065a0b7abe101da6e0037b6e; version=0935d558840099b3679c67bb7468dc78fcbad940 <d2c9eb19fc3b11caebafde4c30a76a49203d18a6; version=0935d558840099b3679c67bb7468dc78fcbad940 <f4e14695fe805eb0f0cb36e0ad6a560b9f985e86; version=0935d558840099b3679c67bb7468dc78fcbad940 <f7e3c88cc2a977c2b9a8aa52c1ce689e7b394e49; version=4.20
The Linux Kernel Organization · Linux Kernelversion=0935d5588400 <24cea9677025; version=0935d5588400 <333b5085522c; version=0935d5588400 <46c4481938e2; version=0935d5588400 <4e8447a9a3d3; version=0935d5588400 <d2c9eb19fc3b; version=0935d5588400 <f4e14695fe80; version=0935d5588400 <f7e3c88cc2a9; version=4.20

Published CVSS scores

6.1Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
7.3Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
6.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499.004Application or System Exploitation
T1068Exploitation for Privilege Escalation

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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