CVE-1999-1476

Low CVSS 2.1

Published 1999-12-31 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-1999-1476, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

NVD record for CVE-1999-1476

CVSS vector: AV:L/AC:L/Au:N/C:N/I:N/A:P