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CVE-2026-21373

HIGH CVSS 3.1: 7.8 EPSS 0.01%
Updated Apr 07, 2026
Parameter Value
CVSS 7.8 (HIGH)
Type CWE-126
Public PoC No

Memory Corruption when accessing an output buffer without validating its size during IOCTL processing.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)