What is CVE-2021-42863?

CVE-2021-42863 is a critical-severity vulnerability in Jerryscript, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-05-12.

How severe is CVE-2021-42863?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Jerryscript

CVE-2021-42863

A buffer overflow in ecma_builtin_typedarray_prototype_filter() in JerryScript version fe3a5c0 allows an attacker to construct a fake object or a fake arraybuffer with unlimited size.

Vulnerability class: Buffer Overflow

EPSS: 0.017 (74.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Jerryscript
N/a — versions n/a

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-42863?: CVE-2021-42863 is a critical-severity vulnerability in Jerryscript, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-05-12.
How severe is CVE-2021-42863?: Critical severity. CVSS v3 base score is 9.8 out of 10.