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CVE-2026-21381— Buffer Over-read in WLAN Firmware

Quick assessment

Affected
Qualcomm, Inc. Snapdragon
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Qualcomm Chipsets是美国高通（Qualcomm）公司的一系列芯片组。 Qualcomm Chipsets存在安全漏洞，该漏洞源于在通过邻居感知网络协议连接进行设备匹配期间接收长度过长的服务数据帧，可能导致瞬时拒绝服务。

CVSS 7.6 · High EPSS 0.15% · P5

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-21381

Vulnerability Information
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Vulnerability Title
Buffer Over-read in WLAN Firmware
Source: CVE Program / CVE List V5
Vulnerability Description
Transient DOS when receiving a service data frame with excessive length during device matching over a neighborhood awareness network protocol connection.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5
Vulnerability Title
Qualcomm Chipsets 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Qualcomm Chipsets是美国高通（Qualcomm）公司的一系列芯片组。 Qualcomm Chipsets存在安全漏洞，该漏洞源于在通过邻居感知网络协议连接进行设备匹配期间接收长度过长的服务数据帧，可能导致瞬时拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Qualcomm, Inc. Snapdragon AR8035 -

II. Public POCs for CVE-2026-21381

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III. Intelligence Information for CVE-2026-21381

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Same Patch Batch · Qualcomm, Inc. · 2026-04-06 · 17 CVEs total

CVE-2025-47392 8.8 HIGH Integer Overflow or Wraparound in GPS
CVE-2025-47389 7.8 HIGH Buffer Copy Without Checking Size of Input in Automotive Platform
CVE-2025-47390 7.8 HIGH Buffer Over-read in Camera
CVE-2025-47391 7.8 HIGH Stack-based Buffer Overflow in Camera Driver
CVE-2026-21371 7.8 HIGH Buffer Over-read in WinBlast Driver
CVE-2026-21372 7.8 HIGH Heap-Based Buffer Overflow in Power Management IC
CVE-2026-21373 7.8 HIGH Buffer Over-read in Camera
CVE-2026-21374 7.8 HIGH Buffer Over-read in Camera
CVE-2026-21375 7.8 HIGH Buffer Over-read in Camera
CVE-2026-21376 7.8 HIGH Buffer Over-read in Camera
CVE-2026-21378 7.8 HIGH Buffer Over-read in Camera
CVE-2026-21380 7.8 HIGH Use After Free in DSP Service
CVE-2026-21382 7.8 HIGH Buffer Copy Without Checking Size of Input in Power Management IC
CVE-2026-21367 7.6 HIGH Buffer Over-read in WLAN Firmware
CVE-2025-47400 7.1 HIGH Buffer Over-read in Computer Vision
CVE-2025-47374 6.5 MEDIUM Use After Free in Camera Driver

IV. Related Vulnerabilities

Same product: Snapdragon
Same vendor: Qualcomm, Inc.
Same weakness: CWE-126

V. Comments for CVE-2026-21381

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