medium
6.5
CWE
120 119
Advisory Published
Updated

CVE-2022-21742: Realtek USB FE/1GbE/2.5GbE/5GbE NIC Family - Buffer Overflow

First published: Mon Jun 20 2022(Updated: )

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.

Credit: twcert@cert.org.tw

Affected SoftwareAffected VersionHow to fix
Realtek Rtl8156 Firmware>=7.42<=7.53
Realtek Rtl8156 Firmware>=8.49<=8.60
Realtek Rtl8156 Firmware>=10.28<10.50
Realtek Rtl8156
Realtek Rtl8156b Firmware>=7.42<=7.53
Realtek Rtl8156b Firmware>=8.49<=8.60
Realtek Rtl8156b Firmware>=10.28<10.50
Realtek Rtl8156b
Realtek Rtl8153 Firmware>=7.42<=7.53
Realtek Rtl8153 Firmware>=8.49<=8.60
Realtek Rtl8153 Firmware>=10.28<10.50
Realtek Rtl8153
Realtek Rtl8153b Firmware>=7.42<=7.53
Realtek Rtl8153b Firmware>=8.49<=8.60
Realtek Rtl8153b Firmware>=10.28<10.50
Realtek Rtl8153b
Realtek Rtl8154 Firmware>=7.42<=7.53
Realtek Rtl8154 Firmware>=8.49<=8.60
Realtek Rtl8154 Firmware>=10.28<10.50
Realtek Rtl8154
Realtek Rtl8154b Firmware>=7.42<=7.53
Realtek Rtl8154b Firmware>=8.49<=8.60
Realtek Rtl8154b Firmware>=10.28<10.50
Realtek Rtl8154b
Realtek Rtl8152b Firmware>=7.42<=7.53
Realtek Rtl8152b Firmware>=8.49<=8.60
Realtek Rtl8152b Firmware>=10.28<10.50
Realtek Rtl8152b

Remedy

Update version to v10.50

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Reference Links

Frequently Asked Questions

  • What is CVE-2022-21742?

    CVE-2022-21742 is a buffer overflow vulnerability in the Realtek USB driver.

  • How does CVE-2022-21742 occur?

    CVE-2022-21742 occurs due to insufficient parameter length verification in the API function of the Realtek USB driver.

  • Who can exploit CVE-2022-21742?

    An unauthenticated LAN attacker can exploit CVE-2022-21742.

  • What is the severity of CVE-2022-21742?

    CVE-2022-21742 has a severity level of 6.5, which is medium.

  • How can CVE-2022-21742 be mitigated?

    To mitigate CVE-2022-21742, it is recommended to update to the latest firmware version provided by Realtek.

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