CVE-2022-21742 Realtek USB FE/1GbE/2.5GbE/5GbE NIC Family - Buffer Overflow
An unauthenticated LAN attacker can cause a buffer overflow in Realtek USB NIC drivers, leading to service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-21742?
CVE-2022-21742 is a medium-severity memory corruption vulnerability in Realtek USB FE/1GbE/2.5GbE/5GbE NIC Family, published on 20 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-120
Which versions are affected by CVE-2022-21742?
It affects 7 products.
Products include Realtek Rtl8152b Firmware, Realtek Rtl8153 Firmware, Realtek Rtl8153b Firmware, Realtek Rtl8154 Firmware, Realtek Rtl8154b Firmware, Realtek Rtl8156 Firmware and 1 more.
How do I fix CVE-2022-21742?
No fix has been published for CVE-2022-21742 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-21742 being exploited?
There is no known exploitation of CVE-2022-21742 in the wild and no public exploit code.
Sources
Also known as GHSA-5rv3-34jj-v83f.