CVE-2023-28075

Arbitrary code execution via timed DMA race

Published Aug 16, 2023 · Updated Oct 8, 2024

TOCTOU in Dell Client Platform BIOS allows physically proximate attackers to execute arbitrary code through a timed DMA transaction. Dell identifies the locus as BIOS execution during an SMI but does not disclose which checked value can be changed before its later use. Exploitation requires a local authenticated user, physical access, and precise DMA timing; success runs arbitrary code on the system.

CVSS severity6.9
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

TOCTOU in Dell Client Platform BIOS allows physically proximate attackers to execute arbitrary code through a timed DMA transaction. Dell identifies the locus as BIOS execution during an SMI but does not disclose which checked value can be changed before its later use. Exploitation requires a local authenticated user, physical access, and precise DMA timing; success runs arbitrary code on the system.

The record

CVE
CVE-2023-28075
Published
Aug 16, 2023
Updated
Oct 8, 2024
Vendor
Dell
Product
Dell Client Platform BIOS
Classifications
CWE-367, T1068
Attack vector
physical
Privileges
admin

Timeline

How it unfolded

  1. Aug 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2024Record 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 <*
  2. Affected versionversion=All Versions

What conditions does exploitation require?

Attack vectorphysical
Required privilegesadmin

What is affected?

Dell · Dell Client Platform BIOSversion=0 <*; version=All Versions

Published CVSS scores

6.3NVDCVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
6.9DellCVSS:3.1/AV:P/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)
Vectorphysical
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
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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