CVE-2020-14163Public exploitNetwork attack vector

Improper memory read via garbage-collection race

Published Jun 15, 2020 · Updated Aug 4, 2024

JerryScript 2.2.0 memory-safety flaw allows attackers to trigger improper memory reads via crafted JavaScript Map key/value operations. The container operation can trigger garbage collection after processing a key but before processing its value, leaving a stale object pointer that ecma_gc_set_object_visited dereferences. Execution requires the vulnerable interpreter to process attacker-controlled script; observed outcomes include crashes or information disclosure, with no evidence of integrity impact.

CVSS severity7.5
High
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

JerryScript 2.2.0 memory-safety flaw allows attackers to trigger improper memory reads via crafted JavaScript Map key/value operations. The container operation can trigger garbage collection after processing a key but before processing its value, leaving a stale object pointer that ecma_gc_set_object_visited dereferences. Execution requires the vulnerable interpreter to process attacker-controlled script; observed outcomes include crashes or information disclosure, with no evidence of integrity impact.

The record

CVE
CVE-2020-14163
Published
Jun 15, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

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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