CVE-2025-47402: Wireless Frame Processing DoS Vulnerability

CVE-2025-47402 Overview

CVE-2025-47402 is a transient denial of service (DoS) vulnerability that occurs when processing a received frame with an excessively large authentication information element. This vulnerability affects Qualcomm wireless components and can be exploited by an attacker within adjacent network range to cause temporary service disruption.

Critical Impact

Attackers within adjacent network proximity can trigger a transient denial of service condition by sending specially crafted frames with oversized authentication information elements, causing temporary system unavailability.

Affected Products

• Qualcomm wireless chipsets (refer to Qualcomm February 2026 Security Bulletin for specific affected components)

Discovery Timeline

• 2026-02-02 - CVE CVE-2025-47402 published to NVD
• 2026-02-03 - Last updated in NVD database

Technical Details for CVE-2025-47402

Vulnerability Analysis

This vulnerability is classified under CWE-126 (Buffer Over-read), indicating that the underlying issue involves reading data beyond the boundaries of an allocated buffer. When processing wireless frames containing authentication information elements, the affected component fails to properly validate the size of the authentication data before processing it.

The vulnerability requires the attacker to be within adjacent network range, meaning they must have local wireless access to the target device. No user interaction is required to exploit this vulnerability, and it can be triggered without any authentication credentials. While the vulnerability does not impact confidentiality or integrity, it can cause a complete denial of availability of the affected component during the attack.

Root Cause

The root cause of this vulnerability is an improper bounds check when handling authentication information elements within wireless frames. The affected code reads beyond the intended buffer boundaries when processing frames that contain authentication data larger than expected, resulting in a buffer over-read condition (CWE-126). This over-read leads to a transient denial of service as the system fails to handle the malformed data gracefully.

Attack Vector

The attack requires adjacent network access, meaning an attacker must be within wireless range of the target device. The exploitation scenario involves:

1. An attacker positions themselves within wireless range of a vulnerable Qualcomm-based device
2. The attacker crafts a malicious wireless frame containing an authentication information element with an excessively large size value
3. When the target device processes this frame, the buffer over-read condition is triggered
4. The affected wireless component experiences a transient denial of service, temporarily disrupting wireless connectivity

The attack has low complexity and requires no privileges or user interaction, making it relatively straightforward to execute for an attacker with the necessary proximity.

Detection Methods for CVE-2025-47402

Indicators of Compromise

• Unexpected wireless connectivity drops or intermittent disconnections
• Abnormal wireless frame traffic patterns with unusually large authentication elements
• System logs indicating crashes or restarts of wireless driver components
• Repeated authentication failures in wireless subsystem logs

Detection Strategies

• Monitor wireless network traffic for frames with abnormally large authentication information elements
• Deploy wireless intrusion detection systems (WIDS) to identify malformed frame patterns
• Configure alerting for repeated wireless subsystem crashes or service restarts
• Analyze firmware and driver logs for buffer over-read error conditions

Monitoring Recommendations

• Implement continuous monitoring of wireless interface health and stability
• Enable detailed logging on wireless access points and controllers
• Set up alerts for devices experiencing repeated wireless disconnections
• Conduct periodic wireless traffic analysis to identify anomalous frame patterns

How to Mitigate CVE-2025-47402

Immediate Actions Required

• Review the Qualcomm February 2026 Security Bulletin for affected products and patch availability
• Identify all Qualcomm-based devices in your environment that may be affected
• Apply firmware updates from device manufacturers as they become available
• Implement network segmentation to limit adjacent network attack surface

Patch Information

Qualcomm has addressed this vulnerability in their February 2026 Security Bulletin. Device manufacturers using affected Qualcomm chipsets should release firmware updates incorporating the fix. Organizations should check with their device vendors for specific patch availability and apply updates following vendor guidance. For detailed patch information, refer to the Qualcomm February 2026 Security Bulletin.

Workarounds

• Limit physical access to wireless network coverage areas where feasible
• Implement wireless network monitoring to detect potential exploitation attempts
• Consider deploying rogue AP detection to identify unauthorized wireless activity
• Where possible, use wired connections for critical systems until patches are applied