CVE-1999-1476
Intel Pentium — NVD-CWE-Other
EPSS 0.1%
- Published: 1999-12-31T05:00:00.000
- Last modified: 2025-04-03T01:03:51.193
- Vendors: Intel
- Products: Pentium, Pentuim
- CWE: 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.
Related CVE by CWE
No related CWE found.
Top CVE for Vendor
- CVE-1999-1476 (no score)
- CVE-2000-0384 (no score)
- CVE-2000-0451 (no score)
- CVE-1999-1566 (no score)
- CVE-2000-0068 (no score)
Recently Exploited Similar Vulnerabilities
No recent KEV-listed items for this vendor/product.
How to fix CVE-1999-1476
CVE-1999-1476 is a unknown severity vulnerability affecting Intel Pentium.
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. Related CVE by CWENo related CWE found.Top CVE for VendorCVE-1999-1476 (no score)CVE-2000-0384 […]
Exploit Difficulty: HARD
⏱️ Time to exploit: > 4 hours
🛠️ Required skills: Advanced security expertise
💰 Public exploits: Rare or not public
How to Fix:
- Check if you're running Pentium
- Update to the latest patched version
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
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. Related CVE by CWENo related CWE found.Top CVE for VendorCVE-1999-1476 (no score)CVE-2000-0384 […]
Exploit Difficulty: HARD
⏱️ Time to exploit: > 4 hours
🛠️ Required skills: Advanced security expertise
💰 Public exploits: Rare or not public
How to Fix:
1 Identify affected systems
- Check if you're running Pentium
2 Immediate actions
- Update to the latest patched version
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
3 Verification
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
4 Long-term prevention
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
CWE: NVD-CWE-Other
Exploit Difficulty Assessment
HARD
Time to Exploit: > 4 hours
Skills Required: Advanced security expertise
Public Exploits: Rare or not public
Vulnerability Timeline
Dec 31, 1999
Vulnerability Published
CVE details first published to NVD database
Apr 03, 2025
Last Modified
CVE details were updated
Nov 03, 2025
Imported to Database
Added to this CVE tracking system
Detection Rules & IOCs
No specific detection rules generated for this vulnerability type.