CVE-1999-1476: Intel Pentium
Low severity, CVSS 2.1. EPSS: 0.3% chance of exploitation in the next 30 days.
A bug in Intel Pentium processor (MMX and Overdrive) allows local users to cause a denial of service (hang) in Intel-based operating systems such as Windows NT and Windows 95, via an invalid instruction, aka the "Invalid Operand with Locked CMPXCHG8B Instruction" problem.
Affected products
Published 1999-12-31. Last modified 2026-06-16.