CVE-2024-35897

Local privilege escalation via stale netfilter hook

Published May 19, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel nf_tables allows local users to gain kernel code execution through a crafted netlink batch. A batch that deletes a base chain and then changes the table dormant flag defers hook unregistration, leaving the freed chain registered for packet processing. Basic local access is sufficient when unprivileged user namespaces grant CAP_NET_ADMIN; triggering the stale hook allows kernel memory control or a kernel panic.

CVSS severity7.8
High
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

Use-after-free in Linux kernel nf_tables allows local users to gain kernel code execution through a crafted netlink batch. A batch that deletes a base chain and then changes the table dormant flag defers hook unregistration, leaving the freed chain registered for packet processing. Basic local access is sufficient when unprivileged user namespaces grant CAP_NET_ADMIN; triggering the stale hook allows kernel memory control or a kernel panic.

The record

CVE
CVE-2024-35897
Published
May 19, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-1287, T1068, T1499
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=179d9ba5559a756f4322583388b3213fe4e391b0 <1bc83a019bbe268be3526406245ec28c2458a518; version=179d9ba5559a756f4322583388b3213fe4e391b0 <2aeb805a1bcd5f27c8c0d1a9d4d653f16d1506f4; version=179d9ba5559a756f4322583388b3213fe4e391b0 <6cbbe1ba76ee7e674a86abd43009b083a45838cb; version=179d9ba5559a756f4322583388b3213fe4e391b0 <7f609f630951b624348373cef99991ce08831927; version=179d9ba5559a756f4322583388b3213fe4e391b0 <9627fd0c6ea1c446741a33e67bc5709c59923827; version=5.10.202 <5.10.215; version=5.13; version=5.4.262 <5.4.274; version=bf8083bbf8fa202e6e5316bbd99759ab82bfe7a3 <e75faf01e22ec7dc671640fa0e0968964fafd2fc; version=d9c4da8cb74e8ee6e58a064a3573aa37acf6c935 <b58d0ac35f6d75ec1db8650a29dfd6f292c11362; version=e10f661adc556c4969c70ddaddf238bffdaf1e87 <9a3b90904d8a072287480eed4c3ece4b99d64f78

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-1287Improper Validation of Specified Type of Input
T1068Exploitation for Privilege Escalation
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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