CVE-2022-40138

Published: Oct 11, 2022Modified: Jun 17, 2026

9.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

An integer conversion error in Hermes bytecode generation, prior to commit 6aa825e480d48127b480b08d13adf70033237097, could have been used to perform Out-Of-Bounds operations and subsequently execute arbitrary code. Note that this is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

Affected (1)

Products: Facebook: Hermes

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Facebook Hermes	Before 2022-09-27

Related CWEs

Incorrect Conversion between Numeric Types

When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.

References (4)

https://github.com/facebook/hermes/commit/6aa825e480d48127b480b08d13adf70033237097

Source: cve-assign@fb.com

PatchThird Party Advisory

https://www.facebook.com/security/advisories/CVE-2022-40138

Source: cve-assign@fb.com

Vendor Advisory

https://github.com/facebook/hermes/commit/6aa825e480d48127b480b08d13adf70033237097

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://www.facebook.com/security/advisories/CVE-2022-40138

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.