CVE-2026-45815

BLE host crash via truncated ATT response

Published Jul 24, 2026 · Updated Jul 24, 2026

Reachable assertion in Apache NimBLE 1.9.0 and earlier allows physically proximate attackers to crash a BLE host via a crafted ATT response. In ble_gattc_read_mult_cb_var(), the ATT parser assumes the response contains one length-prefixed value per requested handle and asserts when parsing ends early. The target must first issue an ATT Read Multiple Variable Request to the peer; a response with too few values terminates assertion-enabled builds, interrupting the service.

CVSS severity7.5
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in Apache NimBLE 1.9.0 and earlier allows physically proximate attackers to crash a BLE host via a crafted ATT response. In ble_gattc_read_mult_cb_var(), the ATT parser assumes the response contains one length-prefixed value per requested handle and asserts when parsing ends early. The target must first issue an ATT Read Multiple Variable Request to the peer; a response with too few values terminates assertion-enabled builds, interrupting the service.

The record

CVE
CVE-2026-45815
Published
Jul 24, 2026
Updated
Jul 24, 2026
Vendor
The Apache Software Foundation
Product
Apache NimBLE
Classifications
CWE-617, T1499.004
Attack vector
adjacent
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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.9.0

What conditions does exploitation require?

Attack vectoradjacent
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
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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