TI-1999-01423 Aliases CVE-1999-1476 GHSA-9chc-c4xr-3frx

A bug in Intel Pentium processor (MMX and Overdrive) allows local users to cause a denial…

LOW 11Published 2002-03-09 · Updated 2024-08-01

Key facts

Attack vector: Local
Privileges required: None
User interaction: — Not recorded in CVSS 2.0
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · Partial
Fix status: No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00286 21st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:h:intel:pentium:::mmx:::::*	all versions	Vulnerable	Intel
cpe:2.3:h:intel:pentuim:::overdrive:::::*	all versions	Vulnerable	Intel

cpe:2.3:h:intel:pentium:*:*:mmx:*:*:*:*:* Versions all versions Vulnerable ·Intel
cpe:2.3:h:intel:pentuim:*:*:overdrive:*:*:*:*:* Versions all versions Vulnerable ·Intel

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-1999-1476
2026-10-03 Alias added: GHSA-9chc-c4xr-3frx

References

Patch 1

Q163852

TI-2018-02664 Observable discrepancy in Intel Multiple CVSS 3.1MEDIUM 5.5
TI-2018-02665 Observable discrepancy in Intel Multiple CVSS 3.0MEDIUM 5.6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences