Xiaomi Mi 5s Gyroscope Ultrasound input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as problematic was found in Xiaomi Mi 5s (version now known). This vulnerability affects some unknown processing of the component Gyroscope. The manipulation with an unknown input leads to a input validation vulnerability (Ultrasound). The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

The gyroscope on Xiaomi Mi 5s devices allows attackers to cause a denial of service (resonance and false data) via a 20.4 kHz audio signal, aka a MEMS ultrasound attack.

The weakness was released 04/25/2019. This vulnerability was named CVE-2018-20823 since 04/25/2019. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/07/2023). This vulnerability has a historic impact due to its background and reception.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.





CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 2.4
VulDB Temp Score: 2.4
VulDB Vector: 🔍
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NVD Base Score: 7.5
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Name: Ultrasound
Class: Input validation / Ultrasound

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


04/25/2019 🔍
04/25/2019 +0 days 🔍
04/26/2019 +1 days 🔍
09/07/2023 +1595 days 🔍


Advisory: hackaday.com
Status: Not defined

CVE: CVE-2018-20823 (🔍)


Created: 04/26/2019 07:10 AM
Updated: 09/07/2023 07:37 AM
Changes: 04/26/2019 07:10 AM (36), 06/02/2020 10:09 AM (17), 09/07/2023 07:37 AM (3)
Complete: 🔍
Cache ID: 34:8AC:40


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