CVE-2023-23904

Privilege escalation via UEFI NULL pointer dereference

Published Sep 16, 2024 · Updated Nov 3, 2025

NULL pointer dereference in Intel UEFI firmware allows local users with high privileges to escalate privileges on affected processors. Intel has not disclosed the affected firmware routine, trigger, or how the NULL pointer dereference changes security state. Exploitation requires local high-privilege access and high attack complexity, and it can modify integrity across a security boundary and interrupt availability.

CVSS severity6.9
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Intel UEFI firmware allows local users with high privileges to escalate privileges on affected processors. Intel has not disclosed the affected firmware routine, trigger, or how the NULL pointer dereference changes security state. Exploitation requires local high-privilege access and high attack complexity, and it can modify integrity across a security boundary and interrupt availability.

The record

CVE
CVE-2023-23904
Published
Sep 16, 2024
Updated
Nov 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-395, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.9Intel CorporationCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
6.1Intel CorporationCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:L

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-395Use of NullPointerException Catch to Detect NULL Pointer Dereference
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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