EUVD-2026-19337Severity by source
AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Transient DOS when receiving a service data frame with excessive length during device matching over a neighborhood awareness network protocol connection.
AnalysisAI
Buffer over-read (CWE-126) in Qualcomm Snapdragon devices causes denial-of-service when processing malformed Neighborhood Awareness Networking (NAN) service data frames with excessive length values. Attack requires network proximity, high attacker privileges, user interaction, and high complexity (CVSS 7.6), yielding CVSS scope change with potential high confidentiality/integrity impact beyond availability disruption. Qualcomm April 2026 bulletin addresses this transient DOS condition. No public exploit identified at time of analysis, though the specific protocol implementation flaw in NAN device discovery presents measurable risk in adjacent network scenarios where attackers have elevated Wi-Fi protocol access.
Technical ContextAI
This vulnerability affects Qualcomm Snapdragon chipsets' implementation of the Wi-Fi Aware (Neighborhood Awareness Networking/NAN) protocol, an IEEE 802.11 extension enabling device-to-device discovery and communication without traditional access points. The root cause is a buffer over-read (CWE-126) triggered during NAN service discovery frame parsing, where length field validation fails when processing service data attributes. NAN operates at the MAC layer for proximity-based peer discovery, making it accessible to attackers within direct wireless range. The buffer over-read occurs during device matching operations when the received frame declares excessive length values that exceed allocated memory boundaries, allowing read access beyond intended buffer limits. The Changed Scope (S:C) metric indicates the vulnerability's impact extends beyond the vulnerable NAN component to affect other system resources or security boundaries within the Snapdragon wireless subsystem.
RemediationAI
Apply firmware updates specified in the Qualcomm April 2026 Security Bulletin available at https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html, which contains model-specific patch versions addressing the NAN frame parsing flaw. Device manufacturers and OEMs must integrate Qualcomm's chipset-level patches into their downstream firmware releases, so end-user patch availability depends on vendor update schedules. Until patching is complete, organizations can mitigate risk by disabling Wi-Fi Aware/NAN functionality through platform-specific wireless configuration interfaces if business requirements permit, reducing attack surface by preventing NAN service discovery frame processing. Network segmentation and wireless intrusion detection systems monitoring for malformed 802.11 NAN frames provide additional defense-in-depth, though detection signatures require knowledge of excessive length field patterns in NAN service data attributes.
More in Snapdragon
View allMemory corruption in Qualcomm Snapdragon Wi-Fi/NAN firmware allows an attacker within wireless range to overflow a stack
Buffer overflow in Qualcomm Snapdragon firmware enables authentication bypass on adjacent networks, allowing remote unau
Local privilege escalation and memory corruption in Qualcomm Snapdragon WLAN firmware occurs when the driver parses malf
Memory corruption in Qualcomm Snapdragon Strongbox component allows local low-privileged attackers to trigger a buffer o
Local privilege escalation in Qualcomm Snapdragon chipsets stems from an out-of-bounds memory access in the Strongbox tr
Memory corruption in Qualcomm Snapdragon chipsets allows adjacent network attackers to achieve arbitrary code execution
Bootloader integrity bypass in Qualcomm Snapdragon platforms allows a high-privileged local attacker to write to a speci
Authentication bypass in Qualcomm Snapdragon SoCs allows adjacent network attackers to exploit a cryptographic flaw duri
Memory corruption in Qualcomm Snapdragon IOCTL device driver handling enables a local low-privilege attacker to achieve
Memory corruption in Qualcomm Snapdragon's fingerprint Trusted Application (TA) allows a local low-privileged attacker t
Memory corruption in Qualcomm Snapdragon platforms occurs when a packet with a size value near the maximum allowable lim
Local privilege escalation via memory corruption affects Qualcomm Snapdragon platforms, where allocating memory with siz
Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today