What is CVE-2021-41683?

CVE-2021-41683 is a high-severity vulnerability in Jerryscript, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-06-20.

How severe is CVE-2021-41683?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Jerryscript

CVE-2021-41683

There is a stack-overflow at ecma-helpers.c:326 in ecma_get_lex_env_type in JerryScript 2.4.0

Vulnerability class: Buffer Overflow

Published 2022-06-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.5th percentile), scored 2026-10-08.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Jerryscript — versions 2.4.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/jerryscript-project/jerryscript/issues/4745 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-41683?: CVE-2021-41683 is a high-severity vulnerability in Jerryscript, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-06-20.
How severe is CVE-2021-41683?: High severity. CVSS v3 base score is 7.8 out of 10.