CVE-2021-42863
CRITICALCVSS 9.8/10EPSS 1.62%
Last modified
CVE-2021-42863 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.62% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jerryscript | Jerryscript | < 2021-10-15 |
References
- https://github.com/jerryscript-project/jerryscript/issues/4793Exploit, Patch, Third Party Advisory
- https://github.com/jerryscript-project/jerryscript/pull/4794Patch, Third Party Advisory
- https://github.com/jerryscript-project/jerryscript/issues/4793Exploit, Patch, Third Party Advisory
- https://github.com/jerryscript-project/jerryscript/pull/4794Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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.
How severe is CVE-2021-42863?
CVE-2021-42863 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.62% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42863?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2021-42863?
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