CVE-2023-41833

Local privilege escalation via UEFI race condition

Published Sep 16, 2024 · Updated Nov 3, 2025

Race condition in Intel UEFI firmware allows local users with high privileges to escalate privileges on affected processors. Intel has not disclosed the affected firmware routine or the unsynchronized operation that loses the race. Exploitation requires local access, high privileges, and a timing-dependent condition; success grants authority beyond the firmware's security boundary.

CVSS severity7.5
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Intel UEFI firmware allows local users with high privileges to escalate privileges on affected processors. Intel has not disclosed the affected firmware routine or the unsynchronized operation that loses the race. Exploitation requires local access, high privileges, and a timing-dependent condition; success grants authority beyond the firmware's security boundary.

The record

CVE
CVE-2023-41833
Published
Sep 16, 2024
Updated
Nov 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362, 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

7.5Intel CorporationCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
8.7Intel CorporationCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('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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