Description

In wpas_handle_robust_av_scs_recv_action of robust_av.c, there is a possible out-of-bounds write due to a logic error in the code. This could lead to remote code execution with System execution privileges needed. User interaction is not needed for exploitation.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.2",
  "pubDate": "2026-10-05T19:17:20.650Z",
  "pubdate": "2026-10-05T19:17:20.650Z",
  "executiveSummary": "The vulnerability identified within wpas_handle_robust_av_scs_recv_action in robust_av.c constitutes an out-of-bounds (OOB) write condition resulting from a critical logic error. This flaw facilitates remote code execution (RCE) by an unauthenticated attacker, posing a severe security risk to the affected system.\nThe vulnerability resides in the processing logic of Robust Audio/Video (AV) Streaming Capacity Specification (SCS) frames. Exploitation does not require user interaction, allowing an attacker within radio range of the target wireless interface to trigger the memory corruption. Successful exploitation grants the attacker System-level execution privileges, effectively compromising the integrity, confidentiality, and availability of the host system.\nGiven that the vulnerability allows for arbitrary code execution with highest-level privileges without prior authentication or user involvement, it is classified as a high-severity critical flaw. Organizations utilizing the affected software should prioritize the identification of patch availability and implement defensive wireless monitoring to detect anomalous frame sequences indicative of exploitation attempts.",
  "technicalDetails": "The vulnerability is situated within the function wpas_handle_robust_av_scs_recv_action in the file robust_av.c. The root cause is a logic error during the parsing or handling of incoming Robust AV SCS action frames. Specifically, the function fails to perform adequate bounds checking on the data payload provided in the frame before copying it into a fixed-size internal memory buffer or performing memory operations based on values derived from the frame itself.\nThe exploitation flow begins when an attacker sends a maliciously crafted Robust AV SCS action frame to the target device. Because the vulnerable function processes these frames without verifying that the length or index parameters are within the expected constraints, the logic error allows an attacker to manipulate the memory address calculation or the size of the write operation. This results in an out-of-bounds write, enabling the corruption of adjacent memory structures, such as function pointers, control structures, or return addresses on the stack or heap.\nBy precisely controlling the contents of the frame, an attacker can overwrite critical memory regions with arbitrary data. When the application subsequently uses these corrupted pointers or structures, control flow is redirected to an attacker-controlled payload. Since the vulnerable component typically operates with elevated permissions, the execution of the injected code occurs with System-level privileges. This privilege escalation bypasses conventional application-layer sandboxing, granting the attacker full control over the compromised process.\nThe attack is characterized as remote due to the nature of wireless frame handling, which does not require the attacker to have established a full connection or authenticated with the target access point or client. The absence of a requirement for user interaction facilitates automated exploitation. The impact of post-exploitation activity includes, but is not limited to, the installation of persistent rootkits, exfiltration of sensitive configuration data or traffic, and total system compromise. The vulnerability represents a failure in input validation and buffer management protocols within the frame processing pipeline, necessitating rigorous bounds enforcement on all incoming frame fields that influence memory addressing or copy lengths."
}