CVE-2021-47786

Redragon Gaming Mouse driver contains a kernel-level vulnerability that allows attackers to trigger a denial of service by sending malformed IOCTL requests. Attackers can send a crafted 2000-byte buffer with specific byte patterns to the REDRAGON_MOUSE device to crash the kernel driver.

CVSS v4.0

6.8 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.46% chance of exploitation in the next 30 days, 38th percentile

Published

2026-01-15

Updated

2026-04-07

Proof-of-concept exploits (3)

• https://www.exploit-db.com/exploits/50322
• Quadron-Research-Lab/Kernel_Driver_bugs/tree/main/REDRAGON_MOUSE
• https://www.vulncheck.com/advisories/redragon-gaming-mouse-redragonmousesys-denial-of-ser…

References

• CVE Record
• NVD entry

Related

• CVE-2021-45401
• CVE-2021-47789
• CVE-2022-26639
• CVE-2022-26640
• CVE-2022-26641
• CVE-2022-26642