What’s Vulnerable › Vulnerabilities

CVE-2021-42863

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-05-12 · updated 2026-06-17
• Weakness: CWE-120

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.

Affected products

• JerryScript: before 2021-10-15 — fixed in 2021-10-15

How to fix

Upgrade to a fixed version: JerryScript 2021-10-15. Check the vendor advisory for mitigations.

References

• https://github.com/jerryscript-project/jerryscript/issues/4793
• https://github.com/jerryscript-project/jerryscript/pull/4794
• https://github.com/jerryscript-project/jerryscript/issues/4793
• https://github.com/jerryscript-project/jerryscript/pull/4794

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