CVE-1999-1476

medium

Description

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.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/704

http://support.microsoft.com/support/kb/articles/q163/8/52.asp

Details

Source: Mitre, NVD

Published: 1999-12-31

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 2.1

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.00058