CVE-2022-29275

Privilege escalation via untrusted UsbCoreDxe pointers

Published Nov 15, 2022 · Updated Apr 30, 2025

Memory corruption in InsydeH2O UsbCoreDxe allows local users to escalate privileges by supplying untrusted pointers to firmware. UsbCoreDxe consumes caller-controlled pointers that can address OS or SMRAM memory, allowing writes across the firmware trust boundary. Local low-privileged access is required; successful exploitation tampers with OS or SMRAM memory and elevates privilege.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in InsydeH2O UsbCoreDxe allows local users to escalate privileges by supplying untrusted pointers to firmware. UsbCoreDxe consumes caller-controlled pointers that can address OS or SMRAM memory, allowing writes across the firmware trust boundary. Local low-privileged access is required; successful exploitation tampers with OS or SMRAM memory and elevates privilege.

The record

CVE
CVE-2022-29275
Published
Nov 15, 2022
Updated
Apr 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8Insyde SoftwareCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
8.2NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
8.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1068Exploitation for Privilege Escalation

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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