CVE-2024-24746Network attack vector

Bluetooth stack hang via GATT timer loop

Published Apr 6, 2024 · Updated Feb 13, 2025

Infinite-loop denial of service in Apache NimBLE through 1.6.0 allows remote attackers to hang the BLE stack with crafted GATT operations. In ble_hs_conn_timer, an expired ATT queued write makes the timer unlock the host, request termination, and continue its unbounded outer loop; the patch terminates the connection under the existing lock and returns after one connection-list pass. A Bluetooth peer within radio range can reach the GATT server without prior authentication and stall the stack or its hosting device.

CVSS severity7.5
High
EPSS probability1.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite-loop denial of service in Apache NimBLE through 1.6.0 allows remote attackers to hang the BLE stack with crafted GATT operations. In ble_hs_conn_timer, an expired ATT queued write makes the timer unlock the host, request termination, and continue its unbounded outer loop; the patch terminates the connection under the existing lock and returns after one connection-list pass. A Bluetooth peer within radio range can reach the GATT server without prior authentication and stall the stack or its hosting device.

The record

CVE
CVE-2024-24746
Published
Apr 6, 2024
Updated
Feb 13, 2025
Vendor
The Apache Software Foundation
Product
Apache NimBLE
Classifications
CWE-835, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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 <=1.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache NimBLEversion=0 <=1.6.0

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Application 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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