CVE-2025-53477Network attack vector

Host crash via unchecked HCI allocation failures

Published Jan 10, 2026 · Updated Jan 10, 2026

NULL pointer dereference in Apache NimBLE 1.8.0 and earlier allows attackers controlling a bogus Bluetooth controller to crash the host. The ble_gap_rx_conn_complete path dereferences a failed connection allocation, while ble_hs_hci_cmd_send writes through a failed command-buffer allocation. Reachability requires disabled debug assertions and a broken or bogus Bluetooth controller; the bounded consequence is a host crash.

CVSS severity7.5
High
EPSS probability0.80%
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 Apache NimBLE 1.8.0 and earlier allows attackers controlling a bogus Bluetooth controller to crash the host. The ble_gap_rx_conn_complete path dereferences a failed connection allocation, while ble_hs_hci_cmd_send writes through a failed command-buffer allocation. Reachability requires disabled debug assertions and a broken or bogus Bluetooth controller; the bounded consequence is a host crash.

The record

CVE
CVE-2025-53477
Published
Jan 10, 2026
Updated
Jan 10, 2026
Vendor
The Apache Software Foundation
Product
Apache NimBLE
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 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?

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  1. Affected versionversion=0 <=1.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache NimBLEversion=0 <=1.8.0

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

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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)
Vectornetwork
Privilegesunauthenticated
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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