CVE-2020-23303

CRITICAL

There is a heap-buffer-overflow at jmem-poolman.c:165 in jmem_pools_collect_empty in JerryScript 2.2.0.

Affects 1 product across 1 vendor.

CVSS 3.19.8
EPSS1.3%
Percentile70th
PatchPatched
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-787: Out-of-Bounds Write

Software writes data past buffer boundaries, corrupting memory and potentially enabling code execution.

◆ AI Analysis — automated analysis, not human-reviewed

A heap-buffer-overflow vulnerability exists in JerryScript 2.2.0 at jmem-poolman.c:165 in the jmem_pools_collect_empty function, which could allow an attacker to execute arbitrary code.

BSID: BS-2021-GLOBAL-148421-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2020-23303?
A heap-buffer-overflow vulnerability exists in JerryScript 2.2.0 at jmem-poolman.c:165 in the jmem_pools_collect_empty function, which could allow an attacker to execute arbitrary code.
What is the CVSS score for CVE-2020-23303?
CVE-2020-23303 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 1.3%.
Is CVE-2020-23303 actively exploited?
No confirmed active exploitation of CVE-2020-23303 as of 2026-05-30.
How do I remediate CVE-2020-23303?
Priority: IMMEDIATE.
What systems are affected by CVE-2020-23303?
CVE-2020-23303 affects Jerryscript Jerryscript.
Vulnerability Details
CVE IDCVE-2020-23303
BSIDBS-2021-GLOBAL-148421-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2021-06-10
Last Modified2024-11-21
ICS Relevance15%
Weakness (CWE)
Out-of-Bounds Write
SourceNVD
Official Description

There is a heap-buffer-overflow at jmem-poolman.c:165 in jmem_pools_collect_empty in JerryScript 2.2.0.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

The vulnerability can be exploited by providing a specially crafted input to the JerryScript engine, leading to a heap-buffer-overflow. This could potentially allow an attacker to execute arbitrary code with the privileges of the JerryScript process.

Exploitation Likelihood: CRITICAL

Affected Products
VendorProductAffected Versions
Jerryscript Jerryscript 2.2.0
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 1953 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
SHA-512 Audit Hash59597fef0087a9eec0e06dddf2d3660e64639f631e1f845fb4e0ffa707d3953d6818db33e2f2441974c523037eeb3e7805f6d26f9ae8e75581221aefb15e55d6
Related CVEs affecting Jerryscript
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