CVE-2026-45816Network attack vector

Host crash via invalid LTK connection handle

Published Jul 24, 2026 · Updated Jul 24, 2026

NULL pointer dereference in Apache NimBLE 1.9.0 and earlier allows attackers controlling the BLE controller to crash the host. ble_sm_ltk_req_rx accepts an LE Long Term Key Request event with an invalid connection handle and, when assertions are disabled, passes the resulting null connection object to ble_hs_conn_addrs. The flaw is reachable only through a bogus or misbehaving controller with assertions disabled, and the bounded consequence is a host crash.

CVSS severity7.5
High
EPSS probability0.61%
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 1.9.0 and earlier allows attackers controlling the BLE controller to crash the host. ble_sm_ltk_req_rx accepts an LE Long Term Key Request event with an invalid connection handle and, when assertions are disabled, passes the resulting null connection object to ble_hs_conn_addrs. The flaw is reachable only through a bogus or misbehaving controller with assertions disabled, and the bounded consequence is a host crash.

The record

CVE
CVE-2026-45816
Published
Jul 24, 2026
Updated
Jul 24, 2026
Vendor
The Apache Software Foundation
Product
Apache NimBLE
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 24, 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 <=1.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache NimBLEversion=0 <=1.9.0

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 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-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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