What is CVE-2021-46170?

CVE-2021-46170 is a high-severity vulnerability in Jerryscript, classified under Use After Free. CVSS score: 7.5/10. Published 2022-01-14.

How severe is CVE-2021-46170?

High severity. CVSS v3 base score is 7.5 out of 10.

Use After Free in Jerryscript

CVE-2021-46170

An issue was discovered in JerryScript commit a6ab5e9. There is an Use-After-Free in lexer_compare_identifier_to_string in js-lexer.c file.

Vulnerability class: Use-After-Free

Published 2022-01-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.1th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Jerryscript — versions 2.3.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

github.com/jerryscript-project/jerryscript/issues/4917 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-46170?: CVE-2021-46170 is a high-severity vulnerability in Jerryscript, classified under Use After Free. CVSS score: 7.5/10. Published 2022-01-14.
How severe is CVE-2021-46170?: High severity. CVSS v3 base score is 7.5 out of 10.