{"id":"CVE-1999-1476","aliases":["EUVD-1999-1457","GHSA-9chc-c4xr-3frx"],"status":"published","title":"A bug in Intel Pentium processor (MMX and Overdrive) allows local users to cause a denial of...","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.","severity":{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00286,"percentile":0.21238,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"1999-12-31T05:00:00Z","modified":"2026-06-16T21:50:31Z","products":[{"vendor":"intel","product":"pentium"},{"vendor":"intel","product":"pentuim"}],"references":[{"url":"http://support.microsoft.com/support/kb/articles/q163/8/52.asp","tags":["vendor-advisory","x_refsource_MSKB","x_transferred","Patch","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/704","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-1999-1476"},{"url":"https://github.com/advisories/GHSA-9chc-c4xr-3frx"}],"sources":{"cve":[{"id":"CVE-1999-1476","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.","status":"published","published":"2002-03-09T05:00:00Z","modified":"2024-08-01T17:18:07.035Z","updated_at":"2026-11-02T14:33:53.295018Z"}],"euvd":[{"id":"EUVD-1999-1457","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.","status":"published","published":"2002-03-09T05:00:00Z","modified":"2024-08-01T17:18:07Z","updated_at":"2026-11-03T03:50:42.451061Z"}],"ghsa":[{"id":"GHSA-9chc-c4xr-3frx","title":"A bug in Intel Pentium processor (MMX and Overdrive) allows local users to cause a denial of...","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.","status":"published","published":"2022-04-30T18:12:33Z","modified":"2023-01-30T05:04:37Z","updated_at":"2026-11-02T14:47:05.478485Z"}],"nvd":[{"id":"CVE-1999-1476","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.","status":"published","published":"1999-12-31T05:00:00Z","modified":"2026-06-16T21:50:31.403Z","cvss":[{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T13:58:51.654586Z"}]}}