CVE-2024-35978

Service interruption via unreleased Bluetooth request state

Published May 20, 2024 · Updated May 12, 2026

Memory leakage in the Bluetooth request path in affected Linux kernels allows local users to interrupt service through repeated requests. hci_req_sync_complete assigns a new request reference without first releasing the previous synchronization request state, retaining kernel memory. A local low-privilege context with access to the Bluetooth request path is required, and the documented consequence is limited to availability.

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

Memory leakage in the Bluetooth request path in affected Linux kernels allows local users to interrupt service through repeated requests. hci_req_sync_complete assigns a new request reference without first releasing the previous synchronization request state, retaining kernel memory. A local low-privilege context with access to the Bluetooth request path is required, and the documented consequence is limited to availability.

The record

CVE
CVE-2024-35978
Published
May 20, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 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=4.1; version=f60cb30579d3401cab1ed36b42df5c0568ae0ba7 <45d355a926ab40f3ae7bc0b0a00cb0e3e8a5a810; version=f60cb30579d3401cab1ed36b42df5c0568ae0ba7 <4beab84fbb50df3be1d8f8a976e6fe882ca65cb2; version=f60cb30579d3401cab1ed36b42df5c0568ae0ba7 <66fab1e120b39f8f47a94186ddee36006fc02ca8; version=f60cb30579d3401cab1ed36b42df5c0568ae0ba7 <75193678cce993aa959e7764b6df2f599886dd06; version=f60cb30579d3401cab1ed36b42df5c0568ae0ba7 <8478394f76c748862ef179a16f651f752bdafaf0; version=f60cb30579d3401cab1ed36b42df5c0568ae0ba7 <89a32741f4217856066c198a4a7267bcdd1edd67; version=f60cb30579d3401cab1ed36b42df5c0568ae0ba7 <9ab5e44b9bac946bd49fd63264a08cd1ea494e76; version=f60cb30579d3401cab1ed36b42df5c0568ae0ba7 <e4cb8382fff6706436b66eafd9c0ee857ff0a9f5

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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-401Missing Release of Memory after Effective Lifetime
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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