ZDI-25-883: Realtek rtl81xx SDK Wi-Fi Driver rtwlanu Heap-based Buffer Overflow Local Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of Realtek rtl81xx SDK Wi-Fi driver. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the N6CSetDOT11CIPHERDEFAULTKEY function. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.
Other sources
This vulnerability allows local attackers to escalate privileges on affected installations of Realtek rtl81xx SDK Wi-Fi driver. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2025-8300.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-25-883?
ZDI-25-883 is classified as a critical severity vulnerability due to its potential for privilege escalation.
How do I fix ZDI-25-883?
To mitigate ZDI-25-883, users should update their Realtek rtl81xx SDK Wi-Fi driver to the latest version provided by Realtek.
Who is affected by ZDI-25-883?
ZDI-25-883 affects installations of the Realtek rtl81xx SDK Wi-Fi driver.
Can ZDI-25-883 be exploited remotely?
No, ZDI-25-883 requires local access to the system for an attacker to exploit the vulnerability.
What can an attacker achieve by exploiting ZDI-25-883?
Exploiting ZDI-25-883 allows an attacker to escalate privileges on the affected system.