Intel Pentium MMX/Override on Windows CMPXCHG8B denial of service

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Intel Pentium MMX/Override on Windows. It has been declared as problematic. Impacted is the function CMPXCHG8B. Executing a manipulation can lead to denial of service. This vulnerability is handled as CVE-1999-1476. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Intel Pentium MMX/Override on Windows (Chip Software) and classified as problematic. This vulnerability affects the function CMPXCHG8B. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

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.

The weakness was released 12/31/1999 (Website). The advisory is shared for download at support.microsoft.com. This vulnerability was named CVE-1999-1476. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (704). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/31/1999 🔍
12/31/1999 +0 days 🔍
06/23/2014 +5288 days 🔍
04/20/2026 +4319 days 🔍

Sourcesinfo

Vendor: intel.com

Advisory: support.microsoft.com
Status: Confirmed

CVE: CVE-1999-1476 (🔍)
GCVE (CVE): GCVE-0-1999-1476
GCVE (VulDB): GCVE-100-15196
X-Force: 704 - Invalid operand instruction could crash Intel Pentium system

Entryinfo

Created: 06/23/2014 13:09
Updated: 04/20/2026 06:51
Changes: 06/23/2014 13:09 (39), 04/05/2019 12:05 (12), 04/20/2026 06:51 (18)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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