CVE-2024-56430Public exploit

Application crash via unchecked null ciphertext

Published Dec 25, 2024 · Updated Aug 27, 2025

NULL pointer dereference in OpenFHE 1.2.3 and earlier allows local users to crash a consuming application through EvalFloor. BinFHEContext::EvalFloor forwards a null ciphertext to BinFHEScheme::EvalFloor, which reads its modulus without first validating the pointer. Reachability requires local control over an application's EvalFloor argument, and the demonstrated consequence is process termination.

CVSS severity2.9
Low
EPSS probability0.37%
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 OpenFHE 1.2.3 and earlier allows local users to crash a consuming application through EvalFloor. BinFHEContext::EvalFloor forwards a null ciphertext to BinFHEScheme::EvalFloor, which reads its modulus without first validating the pointer. Reachability requires local control over an application's EvalFloor argument, and the demonstrated consequence is process termination.

The record

CVE
CVE-2024-56430
Published
Dec 25, 2024
Updated
Aug 27, 2025
Vendor
OpenFHE
Product
OpenFHE
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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?

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

  1. Affected versionversion=0 <=1.2.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

OpenFHE · OpenFHEversion=0 <=1.2.3

Published CVSS scores

2.9MITRECVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

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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