CVE-2024-52880

Firmware interruption via caller-controlled buffer bounds

Published May 15, 2025 · Updated May 16, 2025

Buffer over-read in InsydeH2O kernel 5.2 through 5.7 releases allows local users with high privileges to interrupt firmware services. VariableRuntimeDxe's SecureBootHandler trusts caller-supplied DataSize and VariableNameSize values when checking whether variable data and names fit within the input buffer. Exploitation requires local high privileges; the bounded effect is availability loss, with no vendor-reported data disclosure or modification.

CVSS severity5.3
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 over-read in InsydeH2O kernel 5.2 through 5.7 releases allows local users with high privileges to interrupt firmware services. VariableRuntimeDxe's SecureBootHandler trusts caller-supplied DataSize and VariableNameSize values when checking whether variable data and names fit within the input buffer. Exploitation requires local high privileges; the bounded effect is availability loss, with no vendor-reported data disclosure or modification.

The record

CVE
CVE-2024-52880
Published
May 15, 2025
Updated
May 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-349, CWE-20, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 15, 2025CVE publishedPublication date reported by the CVE source.
  2. May 16, 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3Insyde SoftwareCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H
7.9CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/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.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-349Acceptance of Extraneous Untrusted Data With Trusted Data
CWE-20Improper Input Validation
T1499Endpoint Denial of Service

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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