CVE-2023-48906Public exploit

Service interruption via unchecked negative array index

Published Apr 1, 2024 · Updated Mar 28, 2025

Stack-based overflow in BTstack 1.6 and earlier allows attackers to interrupt service via crafted input to char_for_nibble. The function accepts any signed integer below 16, so a negative value indexes before the hexadecimal lookup table instead of being rejected. No privileges or user interaction are required from an adjacent network position, and the published impact is limited to availability.

CVSS severity4.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based overflow in BTstack 1.6 and earlier allows attackers to interrupt service via crafted input to char_for_nibble. The function accepts any signed integer below 16, so a negative value indexes before the hexadecimal lookup table instead of being rejected. No privileges or user interaction are required from an adjacent network position, and the published impact is limited to availability.

The record

CVE
CVE-2023-48906
Published
Apr 1, 2024
Updated
Mar 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 28, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499Endpoint Denial of Service

Public exploit references

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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