CVE-2023-41093

Packet interception via raced connection-handle reuse

Published Jul 12, 2024 · Updated Aug 2, 2024

Use-after-free in the Bluetooth SDK in Silicon Labs Simplicity SDK 8.0.0 and earlier allows adjacent attackers to intercept packets. The Bluetooth controller can reuse a Connection_Handle during a timing race after its prior recipient leaves, causing packets to remain associated with freed connection state. Exploitation requires precise timing and a 32-bit Arm target, and exposure is limited to a small number of packets intended for the departed recipient.

CVSS severity3.1
Low
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Bluetooth SDK in Silicon Labs Simplicity SDK 8.0.0 and earlier allows adjacent attackers to intercept packets. The Bluetooth controller can reuse a Connection_Handle during a timing race after its prior recipient leaves, causing packets to remain associated with freed connection state. Exploitation requires precise timing and a 32-bit Arm target, and exposure is limited to a small number of packets intended for the departed recipient.

The record

CVE
CVE-2023-41093
Published
Jul 12, 2024
Updated
Aug 2, 2024
Vendor
Sigma Designs
Product
Simplicity SDK
Classifications
CWE-416, CAPEC-620, T1040
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

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

  1. Affected versionversion=0 <=8.0.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Sigma Designs · Simplicity SDKversion=0 <=8.0.0

Published CVSS scores

3.1Silicon LabsCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

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-416Use After Free
CAPEC-620Drop Encryption Level
T1040Network Sniffing

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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