CVE-2024-35789

Kernel crash via stale fast_rx VLAN pointer

Published May 17, 2024 · Updated Aug 5, 2026

Use-after-free in Linux mac80211 allows remote authenticated users to trigger unsafe kernel memory access through VLAN reassignment. The station VLAN-change path leaves fast_rx pointing to the departing VLAN's netdev, then VLAN deletion frees that referenced network device. Reachability requires low-privileged access from an adjacent network and a non-4addr station moved out of a VLAN before that VLAN is deleted.

CVSS severity8.0
High
EPSS probability0.36%
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 mac80211 allows remote authenticated users to trigger unsafe kernel memory access through VLAN reassignment. The station VLAN-change path leaves fast_rx pointing to the departing VLAN's netdev, then VLAN deletion frees that referenced network device. Reachability requires low-privileged access from an adjacent network and a non-4addr station moved out of a VLAN before that VLAN is deleted.

The record

CVE
CVE-2024-35789
Published
May 17, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-416, CWE-400, T1499.004
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 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 vectoradjacent
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=22bc2a4814440c4a8979a381f46fec5d224f5c11; version=4.14.232 <4.15; version=4.19.189 <4.19.312; version=5.10.32 <5.10.215; version=5.11.16 <5.12; version=5.12; version=5.4.114 <5.4.274; version=7cfe824f681e1aaac34ea64bb4def8a77801b672; version=a7f1721684628b8ae6015bca9a176046ee6f30cc <ea9a0cfc07a7d3601cc680718d9cff0d6927a921; version=bd7e90c82850f49c23004d54de14e46d373748a6 <be1dd9254fc115321d6fbee042026d42afc8d931; version=cc413b375c6d95e68a4629cb1ba9d099de78ebb9 <e8b067c4058c0121ac8ca71559df8e2e08ff1a7e; version=dd0b45538146cb6a54d6da7663b8c3afd16ebcfd <2884a50f52313a7a911de3afcad065ddbb3d78fc; version=dd0b45538146cb6a54d6da7663b8c3afd16ebcfd <4f2bdb3c5e3189297e156b3ff84b140423d64685; version=dd0b45538146cb6a54d6da7663b8c3afd16ebcfd <6b948b54c8bd620725e0c906e44b10c0b13087a7; version=dd0b45538146cb6a54d6da7663b8c3afd16ebcfd <7eeabcea79b67cc29563e6a9a5c81f9e2c664d5b; version=dd0b45538146cb6a54d6da7663b8c3afd16ebcfd <c8bddbd91bc8e42c961a5e2cec20ab879f21100f; version=dd0b45538146cb6a54d6da7663b8c3afd16ebcfd <e8678551c0243f799b4859448781cbec1bd6f1cb

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
8.0Linux CNACVSS:3.1/AV:A/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-400Uncontrolled Resource Consumption
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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