CVE-2022-0001Public exploit

Privileged-memory disclosure via shared branch history

Published Mar 11, 2022 · Updated May 5, 2025

Branch History Injection in some Intel Processors allows local users to read privileged memory through speculative execution. Shared branch-history state lets unprivileged code steer an indirect predictor to a privileged disclosure gadget, whose transient cache effects reveal data. Exploitation requires local low-privilege code execution and a usable disclosure gadget; the demonstrated Linux exploit reads arbitrary kernel memory.

CVSS severity4.7
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Branch History Injection in some Intel Processors allows local users to read privileged memory through speculative execution. Shared branch-history state lets unprivileged code steer an indirect predictor to a privileged disclosure gadget, whose transient cache effects reveal data. Exploitation requires local low-privilege code execution and a usable disclosure gadget; the demonstrated Linux exploit reads arbitrary kernel memory.

The record

CVE
CVE-2022-0001
Published
Mar 11, 2022
Updated
May 5, 2025
Vendor
Topcon Positioning Systems, Inc.
Product
Intel Processors
Classifications
T1003.008
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 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

4.7Intel CorporationCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
6.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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 exploitPublished

Weakness, pattern, technique

T1003.008OS Credential Dumping /etc/passwd and /etc/shadow

Public exploit references

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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