CVE-2022-21742

Name: CVE-2022-21742
Creator: NVD / NIST
Published: 2022-06-20T06:15:08.63+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2022-21742 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Realtek USB driver has a buffer overflow vulnerability due to insufficient parameter length verification in the API function. An unauthenticated LAN attacker can exploit this vulnerability to disrupt services.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

Realtek USB driver has a buffer overflow vulnerability due to insufficient parameter length verification in the API function. An unauthenticated LAN attacker can exploit this vulnerability to disrupt services.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.24%

15.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Realtek	Rtl8156 Firmware	>= 7.42, <= 7.53
Realtek	Rtl8156 Firmware	>= 8.49, <= 8.60
Realtek	Rtl8156 Firmware	>= 10.28, < 10.50
Realtek	Rtl8156b Firmware	>= 7.42, <= 7.53
Realtek	Rtl8156b Firmware	>= 8.49, <= 8.60
Realtek	Rtl8156b Firmware	>= 10.28, < 10.50
Realtek	Rtl8153 Firmware	>= 7.42, <= 7.53
Realtek	Rtl8153 Firmware	>= 8.49, <= 8.60
Realtek	Rtl8153 Firmware	>= 10.28, < 10.50
Realtek	Rtl8153b Firmware	>= 7.42, <= 7.53
Realtek	Rtl8153b Firmware	>= 8.49, <= 8.60
Realtek	Rtl8153b Firmware	>= 10.28, < 10.50
Realtek	Rtl8154 Firmware	>= 7.42, <= 7.53
Realtek	Rtl8154 Firmware	>= 8.49, <= 8.60
Realtek	Rtl8154 Firmware	>= 10.28, < 10.50
Realtek	Rtl8154b Firmware	>= 7.42, <= 7.53
Realtek	Rtl8154b Firmware	>= 8.49, <= 8.60
Realtek	Rtl8154b Firmware	>= 10.28, < 10.50
Realtek	Rtl8152b Firmware	>= 7.42, <= 7.53
Realtek	Rtl8152b Firmware	>= 8.49, <= 8.60
Realtek	Rtl8152b Firmware	>= 10.28, < 10.50

References

https://www.twcert.org.tw/tw/cp-132-6057-1cd0d-1.htmlThird Party Advisory
https://www.twcert.org.tw/tw/cp-132-6057-1cd0d-1.htmlThird Party Advisory

Timeline

Published: Jun 20, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21742?

How severe is CVE-2022-21742?

CVE-2022-21742 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21742?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-21742?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST