CVE-2021-0145

Local data disclosure via FSFP predictor isolation failure

Published Feb 9, 2022 · Updated May 5, 2025

Improper initialization in some Intel Processors allows local users to disclose data through Fast Store Forwarding Predictor misuse. Missing FSFP cross-domain training isolation lets user-mode or guest software influence higher-privileged prediction and trigger transient-execution gadgets. A malicious program must run on the same logical processor and find a suitable victim gadget; only confidentiality impact is reported.

CVSS severity6.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper initialization in some Intel Processors allows local users to disclose data through Fast Store Forwarding Predictor misuse. Missing FSFP cross-domain training isolation lets user-mode or guest software influence higher-privileged prediction and trigger transient-execution gadgets. A malicious program must run on the same logical processor and find a suitable victim gadget; only confidentiality impact is reported.

The record

CVE
CVE-2021-0145
Published
Feb 9, 2022
Updated
May 5, 2025
Vendor
Topcon Positioning Systems, Inc.
Product
Intel Processors
Classifications
CWE-665, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 9, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=See references

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Topcon Positioning Systems, Inc. · Intel Processorsversion=See references

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
6.5IntelCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-665Improper Initialization
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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