CVE-1999-1476

2.1
CVSS v2.0 Base Score
0.29%
LOW RiskEPSS (19th percentile)
NVD-CWE-Other

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.

Published: 12/31/1999
Modified: 6/16/2026
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Vulnerability Summary

CVSS v2 Score

2.1

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

EPSS Score (Exploitation Probability)

0.29%LOW Exploitation Risk
19th percentile

This vulnerability has a 0.29% probability of being exploited in the next 30 days, ranking higher than 19% of all scored CVEs.

CWE Classification

NVD-CWE-Other

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