Realtek rtl81xx SDK Wi-Fi Driver rtwlanu Heap-based Buffer Overflow Local Privilege Escalation Vulnerability (CVE-2025-8300)

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 N6CSet_DOT11_CIPHER_DEFAULT_KEY 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.

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