CVE-2024-48983Network attack vector

Device crash via HCI packet length overflow

Published Nov 20, 2024 · Updated Nov 25, 2024

Integer overflow in Cordio BLE HCI processing in Arm Mbed OS 6.16.0 allows remote attackers to crash devices with crafted HCI packets. hciTrSerialRxIncoming adds an attacker-controlled 16-bit body length to header and message metadata sizes without overflow checks, allocates the wrapped size, then copies the full body. Unauthenticated network access to an HCI transport is required, and the bounded consequence is memory corruption and a device crash rather than code execution.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Cordio BLE HCI processing in Arm Mbed OS 6.16.0 allows remote attackers to crash devices with crafted HCI packets. hciTrSerialRxIncoming adds an attacker-controlled 16-bit body length to header and message metadata sizes without overflow checks, allocates the wrapped size, then copies the full body. Unauthenticated network access to an HCI transport is required, and the bounded consequence is memory corruption and a device crash rather than code execution.

The record

CVE
CVE-2024-48983
Published
Nov 20, 2024
Updated
Nov 25, 2024
Vendor
Arm
Product
Arm Mbed OS
Classifications
CWE-190, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 25, 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?

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  1. Affected versionversion=6.16.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Arm · Arm Mbed OSversion=6.16.0

Published CVSS scores

7.5CISA ADP VulnrichmentCVSS: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 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-190Integer Overflow or Wraparound
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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