CVE-2024-8361Network attack vector

Device denial of service via SHA2/224 assertion

Published Jan 7, 2025 · Updated Sep 16, 2025

Reachable assertion in Silicon Labs WiSeConnect SDK 3.3.4 and earlier allows remote attackers to crash SiWx91x devices via SHA2/224. The SHA2/224 implementation returns a 256-bit digest instead of 224 bits, and the resulting length mismatch triggers a software assertion. No privileges or user interaction are required; a watchdog restarts the device, while systems without one remain unavailable until a hard reset.

CVSS severity7.5
High
EPSS probability0.43%
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 Silicon Labs WiSeConnect SDK 3.3.4 and earlier allows remote attackers to crash SiWx91x devices via SHA2/224. The SHA2/224 implementation returns a 256-bit digest instead of 224 bits, and the resulting length mismatch triggers a software assertion. No privileges or user interaction are required; a watchdog restarts the device, while systems without one remain unavailable until a hard reset.

The record

CVE
CVE-2024-8361
Published
Jan 7, 2025
Updated
Sep 16, 2025
Vendor
Sigma Designs
Product
WiSeConnect SDK
Classifications
CWE-617, CWE-131, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=0 <=3.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sigma Designs · WiSeConnect SDKversion=0 <=3.3.4

Published CVSS scores

7.5Silicon LabsCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
CWE-131Incorrect Calculation of Buffer Size
T1499.004Application or System Exploitation

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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