CVE-2021-42863
CVSS v3
9.8
CRITICAL
EPSS Score
1.7 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2022-05-12
Frequently asked questions
What is 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.
Is CVE-2021-42863 actively exploited?
Active exploitation of CVE-2021-42863 has not been confirmed. Its EPSS score was 1.7% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-42863?
CVE-2021-42863 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-42863 affecting your environment?
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