CVE-2023-30470

Published: May 18, 2023Modified: 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

A use-after-free related to unsound inference in the bytecode generation when optimizations are enabled for Hermes prior to commit da8990f737ebb9d9810633502f65ed462b819c09 could have been used by an attacker to achieve remote code execution. 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	All versions

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (4)

https://github.com/facebook/hermes/commit/da8990f737ebb9d9810633502f65ed462b819c09

Source: cve-assign@fb.com

Patch

https://www.facebook.com/security/advisories/cve-2023-30470

Source: cve-assign@fb.com

PatchVendor Advisory

https://github.com/facebook/hermes/commit/da8990f737ebb9d9810633502f65ed462b819c09

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

Patch

https://www.facebook.com/security/advisories/cve-2023-30470

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

PatchVendor Advisory

Timeline

No history available yet.