CVE-2023-23556

State: Published
Severity: 9.8 Critical
Published: May 18, 2023
Updated: Jan 31, 2025
Reserved: Jan 12, 2023

Description

An error in BigInt conversion to Number in Hermes prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80 could have been used by a malicious attacker to execute arbitrary code due to an out-of-bound write. Note that this bug is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
HermesFacebook	before a6dcafe6ded8e61658b40f5699878cd19a481f80Affected

References

https://www.facebook.com/security/advisories/cve-2023-23556
https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80

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