CVE-2022-34391

Privileged SMRAM code execution via malformed SMI input

Published Oct 12, 2022 · Updated May 16, 2025

Improper input validation in Dell Client Platform BIOS before 1.2.15 allows local users to execute arbitrary code in SMRAM through an SMI. Dell identifies the fault as insufficient validation of SMI-supplied data, but does not disclose the affected SMI handler, input field, or rejected boundary condition. Reaching the flaw requires local authenticated access with high privileges; successful exploitation crosses into System Management Mode and gains control of SMRAM-resident code and data.

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

What happened

Improper input validation in Dell Client Platform BIOS before 1.2.15 allows local users to execute arbitrary code in SMRAM through an SMI. Dell identifies the fault as insufficient validation of SMI-supplied data, but does not disclose the affected SMI handler, input field, or rejected boundary condition. Reaching the flaw requires local authenticated access with high privileges; successful exploitation crosses into System Management Mode and gains control of SMRAM-resident code and data.

The record

CVE
CVE-2022-34391
Published
Oct 12, 2022
Updated
May 16, 2025
Vendor
Dell
Product
Dell Client Platform BIOS
Classifications
CWE-119, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 12, 2022CVE publishedPublication date reported by the CVE source.
  2. May 16, 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?

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

  1. Affected versionversion=unspecified <1.2.15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Dell · Dell Client Platform BIOSversion=unspecified <1.2.15

Published CVSS scores

7.5DellCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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-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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