CVE-2024-35933

Kernel crash via unchecked NULL HCI response

Published May 19, 2024 · Updated May 12, 2026

NULL pointer dereference in the btintel driver in affected Linux and Siemens TM MFP kernel releases allows local users to crash the kernel. btintel_read_version treats a NULL buffer returned after HCI command completion as valid because it checks only IS_ERR, then dereferences the buffer; the fix uses IS_ERR_OR_NULL. Local low-privileged access and an Intel Bluetooth controller are required, and the documented impact is a kernel crash without data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.22%
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 the btintel driver in affected Linux and Siemens TM MFP kernel releases allows local users to crash the kernel. btintel_read_version treats a NULL buffer returned after HCI command completion as valid because it checks only IS_ERR, then dereferences the buffer; the fix uses IS_ERR_OR_NULL. Local low-privileged access and an Intel Bluetooth controller are required, and the documented impact is a kernel crash without data disclosure or modification.

The record

CVE
CVE-2024-35933
Published
May 19, 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. May 19, 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=5.17; version=abfeea476c68afea54c9c050a2d3b19d5d2ee873 <22d3053ef05f0b5045e45bd91e7473846261d65e; version=abfeea476c68afea54c9c050a2d3b19d5d2ee873 <b19fe5eea619d54eea59bb8a37c0f8d00ef0e912; version=abfeea476c68afea54c9c050a2d3b19d5d2ee873 <b79e040910101b020931ba0c9a6b77e81ab7f645; version=abfeea476c68afea54c9c050a2d3b19d5d2ee873 <ffdca0a62abaf8c41d8d9ea132000fd808de329b

Published CVSS scores

5.5NVDCVSS: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.

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Technologies

Your stack

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Your stack

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