CVE-2020-24187Public exploit

Process crash via null lexical-environment dereference

Published Aug 11, 2023 · Updated Oct 9, 2024

Null pointer dereference in JerryScript 2.3.0 allows local users to crash the interpreter by running crafted ECMAScript modules. During module namespace construction, ecma_module_namespace_object_add_export_if_needed passes a null lexical-environment pointer to ecma_get_lex_env_type, which dereferences object_p. The interpreter must execute the crafted import and export module set, and the demonstrated consequence is a segmentation fault that interrupts the process.

CVSS severity5.5
Medium
EPSS probability0.33%
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 JerryScript 2.3.0 allows local users to crash the interpreter by running crafted ECMAScript modules. During module namespace construction, ecma_module_namespace_object_add_export_if_needed passes a null lexical-environment pointer to ecma_get_lex_env_type, which dereferences object_p. The interpreter must execute the crafted import and export module set, and the demonstrated consequence is a segmentation fault that interrupts the process.

The record

CVE
CVE-2020-24187
Published
Aug 11, 2023
Updated
Oct 9, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2024Record 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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.

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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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