CVE-2024-8361

High

Published: 07 January 2025

Published

07 January 2025

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Score 0.0026 49.6th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-8361 is a high-severity Incorrect Calculation of Buffer Size (CWE-131) vulnerability in Silabs (inferred from references). Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 49.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SC-5 (Denial-of-service Protection) and SI-11 (Error Handling).

Threat & Defense at a Glance

What attackers do: exploitation maps to Application or System Exploitation (T1499.004). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Directly mitigates the cryptographic implementation flaw in SHA2/224 by requiring identification, reporting, and timely correction of vulnerabilities like CVE-2024-8361.

SC-5 Denial-of-service Protection good match

preventdetect

Protects system availability against the network-exploitable DoS triggered by the faulty SHA2/224 hash computation and assertion failure.

SI-11 Error Handling good match

prevent

Ensures error handling for the incorrect 256-bit hash output does not compromise availability through exploitable assertions leading to crashes.

MITRE ATT&CK Enterprise TechniquesAI

T1499.004 Application or System Exploitation Impact

Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.

attack.mitre.org →

Why these techniques?

Remote exploitation of crypto implementation flaw (wrong hash length) triggers assertion and device crash, directly mapping to application/system exploitation for endpoint DoS.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

NVD Description

In SiWx91x devices, the SHA2/224 algorithm returns a hash of 256 bits instead of 224 bits. This incorrect hash length triggers a software assertion, which subsequently causes a Denial of Service (DoS). If a watchdog is implemented, device will restart…

after watch dog expires. If watchdog is not implemented, device can be recovered only after a hard reset

Deeper analysisAI

CVE-2024-8361 is a vulnerability in SiWx91x devices where the SHA2/224 algorithm incorrectly returns a hash of 256 bits instead of the expected 224 bits. This discrepancy triggers a software assertion, resulting in a Denial of Service (DoS) condition. The affected component is part of the cryptographic implementation in these Silicon Labs devices.

The vulnerability has a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating it is exploitable over the network with low complexity, requiring no privileges or user interaction. A remote attacker can trigger the assertion by providing input that invokes the faulty SHA2/224 computation, causing the device to crash. If a watchdog timer is implemented, the device will restart after expiration; otherwise, recovery requires a hard reset. The issue is linked to CWE-131 (incorrect buffer size calculation) and CWE-617 (reachable assertion).

For mitigation details, refer to the Silicon Labs community advisory at https://community.silabs.com/068Vm00000I7zqo. The vulnerability was published on 2025-01-07.