CVE-2022-34401

SMRAM code execution via oversized SMI parameter

Published Jan 18, 2023 · Updated Apr 3, 2025

Stack-based buffer overflow in Dell Client Platform BIOS allows local users to execute arbitrary code in SMRAM through an SMI. The SMI input path accepts a parameter larger than expected, overflowing a stack buffer within protected SMRAM. Reaching the flaw requires a local authenticated user able to issue the crafted SMI, and successful exploitation executes code inside the isolated SMM environment.

CVSS severity7.5
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack-based buffer overflow in Dell Client Platform BIOS allows local users to execute arbitrary code in SMRAM through an SMI. The SMI input path accepts a parameter larger than expected, overflowing a stack buffer within protected SMRAM. Reaching the flaw requires a local authenticated user able to issue the crafted SMI, and successful exploitation executes code inside the isolated SMM environment.

The record

CVE
CVE-2022-34401
Published
Jan 18, 2023
Updated
Apr 3, 2025
Vendor
Dell
Product
Dell Client Platform BIOS
Classifications
CWE-121, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.4.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Dell · Dell Client Platform BIOSversion=1.4.3

Published CVSS scores

7.5DellCVSS:3.1/AV:L/AC:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo