CVE-2022-34399

SMRAM disclosure via oversized BIOS input

Published Jan 18, 2023 · Updated Apr 3, 2025

Buffer access with an incorrect length in Dell Alienware m17 R5 BIOS before 1.2.2 allows local users with administrator privileges to read SMRAM data. The affected BIOS operation accepts input larger than its expected buffer length and exposes certain sections of SMRAM. Local execution and administrator privileges are required, and the published consequence is limited to disclosure of those protected memory sections.

CVSS severity5.1
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer access with an incorrect length in Dell Alienware m17 R5 BIOS before 1.2.2 allows local users with administrator privileges to read SMRAM data. The affected BIOS operation accepts input larger than its expected buffer length and exposes certain sections of SMRAM. Local execution and administrator privileges are required, and the published consequence is limited to disclosure of those protected memory sections.

The record

CVE
CVE-2022-34399
Published
Jan 18, 2023
Updated
Apr 3, 2025
Vendor
Dell
Product
Dell Client Platform BIOS
Classifications
CWE-805, CWE-119, T1005
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

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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=0 <1.2.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Dell · Dell Client Platform BIOSversion=0 <1.2.2

Published CVSS scores

2.3NISTCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
5.1DellCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-805Buffer Access with Incorrect Length Value
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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