EUVD-2026-19320
GHSA-78j8-w6rh-444w
Severity 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 processing nonstandard FILS Discovery Frames with out-of-range action sizes during initial scans.
AnalysisAI
Out-of-bounds read in Qualcomm Snapdragon WiFi firmware triggers denial-of-service when processing malformed FILS Discovery frames during network scans. Remote attackers on the same wireless network can crash affected devices by broadcasting specially crafted 802.11ai Fast Initial Link Setup frames with invalid action field sizes. CVSS 7.6 (High) reflects the high attack complexity and required high privileges, though the confidentiality/integrity impacts appear overstated for a transient DOS condition. EPSS data not available; no public exploit identified at time of analysis.
Technical ContextAI
This vulnerability affects Qualcomm Snapdragon chipset WiFi firmware implementations handling IEEE 802.11ai FILS (Fast Initial Link Setup) Discovery frames. FILS Discovery frames are beacon-like management frames that advertise network presence to expedite initial connection establishment. The CWE-126 classification indicates an out-of-bounds buffer read vulnerability occurring when the firmware parser encounters FILS frames with action field sizes exceeding expected boundaries. During active or passive scanning operations, the WiFi stack processes these frames without proper validation of size parameters, leading to memory access violations. The transient nature suggests the device recovers after the crash, but repeated exploitation could sustain denial-of-service. The vulnerability resides in low-level firmware rather than operating system drivers, affecting the baseband processor's real-time WiFi protocol handling.
RemediationAI
Apply firmware updates provided in the Qualcomm April 2026 Security Bulletin available at https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html. Device manufacturers (OEMs) typically integrate Qualcomm firmware patches into their own security update cycles, so end users should install the latest security patches from their device vendor (Samsung, Xiaomi, OnePlus, etc.) that incorporate the April 2026 Qualcomm fixes. For enterprise-managed devices, prioritize updates for assets operating in untrusted wireless environments. No workarounds are documented; mitigation requires firmware patching. Organizations unable to immediately patch should consider restricting device usage in high-risk WiFi environments and disabling automatic WiFi scanning where operationally feasible, though this significantly degrades user experience.
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Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today