CVE-2024-6135Public exploit

Device crash via unchecked Bluetooth buffer pulls

Published Sep 13, 2024 · Updated Sep 16, 2024

Heap buffer overflow in Zephyr RTOS 3.6 and earlier allows physically proximate attackers to crash Bluetooth Classic devices. The l2cap_br_info_rsp and sdp_client_receive handlers pull multibyte fields from undersized network buffers without first checking the remaining length. A Bluetooth Classic peer must supply malformed L2CAP information or SDP response data; successful exploitation corrupts heap memory and interrupts the device.

CVSS severity7.6
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in Zephyr RTOS 3.6 and earlier allows physically proximate attackers to crash Bluetooth Classic devices. The l2cap_br_info_rsp and sdp_client_receive handlers pull multibyte fields from undersized network buffers without first checking the remaining length. A Bluetooth Classic peer must supply malformed L2CAP information or SDP response data; successful exploitation corrupts heap memory and interrupts the device.

The record

CVE
CVE-2024-6135
Published
Sep 13, 2024
Updated
Sep 16, 2024
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-122, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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 <=3.6
  2. Affected versionversion=* <=3.6

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=0 <=3.6; version=* <=3.6

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.6Zephyr ProjectCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499Endpoint Denial of Service

Public exploit references

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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