Cyber Resilience

CVE-2021-26194

MediumPublic PoC

Published: 10 June 2021

Published
10 June 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS Score 0.0024 47.1th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-26194 is a medium-severity Use After Free (CWE-416) vulnerability in Jerryscript Jerryscript. Its CVSS base score is 6.5 (Medium).

Operationally, ranked at the 47.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

An issue was discovered in JerryScript 2.4.0. There is a heap-use-after-free in ecma_is_lexical_environment in the ecma-helpers.c file.

CWE(s)
CWE-416

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

jerryscript
jerryscript
2.4.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-416

Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.

References