What’s Vulnerable › Vulnerabilities

CVE-1999-1476

• Severity: low (CVSS 2.1 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 1999-12-31 · updated 2026-06-16

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.

Affected products

• Intel Pentium: all versions
• Intel Pentuim: all versions

References

• http://support.microsoft.com/support/kb/articles/q163/8/52.asp
• https://exchange.xforce.ibmcloud.com/vulnerabilities/704
• http://support.microsoft.com/support/kb/articles/q163/8/52.asp
• https://exchange.xforce.ibmcloud.com/vulnerabilities/704

Get alerted when CVE-1999-1476 or the next vulnerability affects your stack