CVE-2023-0775

Bluetooth LE service interruption via invalid prepare-write request

Published Mar 28, 2023 · Updated Feb 18, 2025

Improper input validation in Silicon Labs GSDK 5.1.0 through 5.1.1 allows remote attackers to interrupt Bluetooth LE service. The stack fails to reject an invalid ATT Prepare Write Request, exhausting its memory until it cannot handle later connections. An unauthenticated attacker within Bluetooth range can make the Bluetooth LE interface unavailable without affecting confidentiality or integrity.

CVSS severity6.5
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Silicon Labs GSDK 5.1.0 through 5.1.1 allows remote attackers to interrupt Bluetooth LE service. The stack fails to reject an invalid ATT Prepare Write Request, exhausting its memory until it cannot handle later connections. An unauthenticated attacker within Bluetooth range can make the Bluetooth LE interface unavailable without affecting confidentiality or integrity.

The record

CVE
CVE-2023-0775
Published
Mar 28, 2023
Updated
Feb 18, 2025
Vendor
Sigma Designs
Product
Gecko SDK (GSDK)
Classifications
CWE-20, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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?

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

  1. Affected versionversion=1.0 <=v5.1.1 changes=[{"at":"5.1.0","status":"affected"}]

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Sigma Designs · Gecko SDK (GSDK)version=1.0 <=v5.1.1 changes=[{"at":"5.1.0","status":"affected"}]

Published CVSS scores

6.5Silicon LabsCVSS:3.1/AV:A/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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