ZDI-25-880: Realtek RTL8811AU rtwlanu.sys N6CSet_DOT11_CIPHER_DEFAULT_KEY Heap-based Buffer Overflow Local Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of Realtek RTL8811AU drivers. 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 RTL8811AU drivers. 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 7.8. The following CVEs are assigned: CVE-2025-8301.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-25-880?
The severity of ZDI-25-880 is considered high due to the potential for local privilege escalation on affected systems.
How do I fix ZDI-25-880?
To fix ZDI-25-880, you should update to the latest version of the Realtek RTL8811AU drivers that addresses this vulnerability.
Who is affected by ZDI-25-880?
ZDI-25-880 affects installations of the Realtek RTL8811AU drivers on systems where local attackers can execute low-privileged code.
What type of vulnerability is ZDI-25-880?
ZDI-25-880 is a local privilege escalation vulnerability that requires prior access to the system.
Can ZDI-25-880 be exploited remotely?
No, ZDI-25-880 cannot be exploited remotely as it requires local access to execute low-privileged code.