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CVE Record

CVE-2021-41751: Buffer overflow vulnerability in file ecma-builtin-array-prototype.c:909 in function ecma_builtin_array_pro...

Buffer overflow vulnerability in file ecma-builtin-array-prototype.c:909 in function ecma_builtin_array_prototype_object_slice in Jerryscript before commit e1ce7dd7271288be8c0c8136eea9107df73a8ce2 on Oct 20, 2021.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2021-41751 is a reported buffer overflow in JerryScript’s Array.prototype.slice implementation. The public record ties exposure to JerryScript code before commit e1ce7dd7271288be8c0c8136eea9107df73a8ce2. Severity, affected release mapping, and product CPE data are not provided, so business urgency depends on whether your software embeds that vulnerable JerryScript code.

Executive priority

Treat this as a targeted dependency verification item, not an emergency, unless JerryScript is embedded in systems that run untrusted JavaScript. The main decision is whether vulnerable code exists in your environment; public severity and exploitation evidence are incomplete.

Technical view

The issue is described as a buffer overflow in ecma-builtin-array-prototype.c at line 909, inside ecma_builtin_array_prototype_object_slice. The source bundle identifies JerryScript before the Oct. 20, 2021 commit e1ce7dd7271288be8c0c8136eea9107df73a8ce2 as affected. No CVSS, CWE, CPE, exploitability detail, or release-version mapping is included.

Likely exposure

Exposure is likely limited to applications, firmware, or services that include JerryScript source predating commit e1ce7dd7271288be8c0c8136eea9107df73a8ce2. The CVE record does not identify affected vendors, packaged products, release versions, or CPEs.

Exploitation context

The source bundle does not report active exploitation, and the CVE is not listed as KEV. The public description does not provide exploit prerequisites, impact scope, or attack surface details beyond the vulnerable JerryScript function.

Researcher notes

The record is sparse: no CVSS, CWE, CPE, exploit status, or affected release list is provided. Analysis should focus on source provenance, commit ancestry, and whether Array.prototype.slice can be reached with attacker-controlled JavaScript in the deployed context.

Mitigation direction

  • Identify whether any maintained codebase embeds JerryScript.
  • Confirm whether embedded JerryScript includes commit e1ce7dd7271288be8c0c8136eea9107df73a8ce2 or later.
  • If not, update to vendor-maintained JerryScript code containing the fix commit.
  • Check JerryScript project guidance for release-version mapping and upgrade notes.
  • Prioritize systems that process untrusted JavaScript input.

Validation and detection

  • Search dependency inventories for JerryScript source or vendored copies.
  • Compare vendored JerryScript commit history against e1ce7dd7271288be8c0c8136eea9107df73a8ce2.
  • Review ecma-builtin-array-prototype.c for the vulnerable pre-fix implementation.
  • Confirm public-facing or user-controlled JavaScript execution paths.
  • Document uncertainty where release versions cannot be mapped to commits.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2021-41751 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.