CVE-2024-0762

UEFI code execution via unchecked GetVariable length

Published May 14, 2024 · Updated Jul 28, 2025

Buffer overflow in Phoenix SecureCore firmware allows local users to execute code in UEFI through a crafted TPM configuration variable. The vulnerable module calls GetVariable twice for TCG2_CONFIGURATION with the same eight-byte stack buffer and reuses the enlarged DataSize returned after EFI_BUFFER_TOO_SMALL without validating it. Exploitation requires local high-privilege access to modify that runtime variable, and reachability depends on each platform's variable permissions.

CVSS severity7.5
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Phoenix SecureCore firmware allows local users to execute code in UEFI through a crafted TPM configuration variable. The vulnerable module calls GetVariable twice for TCG2_CONFIGURATION with the same eight-byte stack buffer and reuses the enlarged DataSize returned after EFI_BUFFER_TOO_SMALL without validating it. Exploitation requires local high-privilege access to modify that runtime variable, and reachability depends on each platform's variable permissions.

The record

CVE
CVE-2024-0762
Published
May 14, 2024
Updated
Jul 28, 2025
Vendor
Phoenix Technologies
Product
SecureCore for Intel Ice Lake
Classifications
CWE-120, T1542.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.2.0.1 <4.2.0.323

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Phoenix Technologies · SecureCore for Intel Ice Lakeversion=4.2.0.1 <4.2.0.323
Phoenix Technologies · SecureCore for Intel Comet Lakeversion=4.2.1.1 <4.2.1.287
Phoenix Technologies · SecureCore for Intel Kaby Lakeversion=4.0.1.1 <4.0.1.998
Phoenix Technologies · SecureCore Technology 4version=4.0.1.1 <4.0.1.998; version=4.1.0.1 <4.1.0.562; version=4.2.0.1 <4.2.0.323; version=4.2.1.1 <4.2.1.287; version=4.3.0.1 <4.3.0.236; version=4.3.1.1 <4.3.1.184; version=4.4.0.1 <4.4.0.269; version=4.5.0.1 <4.5.0.218; version=4.5.1.1 <4.5.1.15
Phoenix Technologies · SecureCore for Intel Raptor Lakeversion=4.5.0.1 <4.5.0.218
Phoenix Technologies · SecureCore for Intel Jasper Lakeversion=4.3.1.1 <4.3.1.184
Phoenix Technologies · SecureCore for Intel Meteor Lakeversion=4.5.1.1 <4.5.1.15
Phoenix Technologies · SecureCore for Intel Tiger Lakeversion=4.3.0.1 <4.3.0.236
Phoenix Technologies · SecureCore for Intel Alder Lakeversion=4.4.0.1 <4.4.0.269
Phoenix Technologies · SecureCore for Intel Coffee Lakeversion=4.1.0.1 <4.1.0.562

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5Phoenix Technologies, Inc.CVSS:3.1/AV:L/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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1542.001Pre-OS Boot: System Firmware

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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