CVE-2026-21371 PUBLISHED

Buffer Over-read in WinBlast Driver

Assigner: qualcomm
Reserved: 17.12.2025 Published: 06.04.2026 Updated: 06.04.2026

Memory Corruption when retrieving output buffer with insufficient size validation.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 7.8

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Qualcomm, Inc.
Product	Snapdragon
Versions	Default: unaffected Version AQT1000 is affected Version Cologne is affected Version FastConnect 6200 is affected Version FastConnect 6700 is affected Version FastConnect 6800 is affected Version FastConnect 6900 is affected Version FastConnect 7800 is affected Version QCA0000 is affected Version QCA6391 is affected Version QCA6420 is affected Version QCA6430 is affected Version QCM5430 is affected Version QCM6490 is affected Version Qualcomm Video Collaboration VC3 Platform is affected Version SC8380XP is affected Version SM6250 is affected Version Snapdragon 460 Mobile Platform is affected Version Snapdragon 662 Mobile Platform is affected Version Snapdragon 7c Compute Platform is affected Version Snapdragon 7c Gen 2 Compute Platform "Rennell Pro" is affected Version Snapdragon 7c+ Gen 3 Compute is affected Version Snapdragon 8c Compute Platform "Poipu Lite" is affected Version Snapdragon 8c Compute Platform (SC8180XP-AD) "Poipu Lite" is affected Version Snapdragon 8cx Compute Platform is affected Version Snapdragon 8cx Compute Platform "Poipu Pro" is affected Version Snapdragon 8cx Gen 2 5G Compute Platform is affected Version Snapdragon 8cx Gen 2 5G Compute Platform "Poipu Pro" is affected Version Snapdragon 8cx Gen 3 Compute Platform is affected Version WCD9340 is affected Version WCD9341 is affected Version WCD9370 is affected Version WCD9375 is affected Version WCD9378C is affected Version WCD9380 is affected Version WCD9385 is affected Version WCN3950 is affected Version WCN3988 is affected Version WSA8810 is affected Version WSA8815 is affected Version WSA8830 is affected Version WSA8835 is affected Version WSA8840 is affected Version WSA8845 is affected Version WSA8845H is affected Version X2000077 is affected Version X2000086 is affected Version X2000090 is affected Version X2000092 is affected Version X2000094 is affected Version XG101002 is affected Version XG101032 is affected Version XG101039 is affected

References

https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html

Problem Types

CWE-126 Buffer Over-read CWE