CVE-2023-24833

Published: May 18, 2023Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

A use-after-free in BigIntPrimitive addition in Hermes prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80 could have been used by an attacker to leak raw data from Hermes VM’s heap. 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 2023-02-02

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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/a6dcafe6ded8e61658b40f5699878cd19a481f80

Source: cve-assign@fb.com

Patch

https://www.facebook.com/security/advisories/cve-2023-24833

Source: cve-assign@fb.com

PatchVendor Advisory

https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80

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

Patch

https://www.facebook.com/security/advisories/cve-2023-24833

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

PatchVendor Advisory

Timeline

No history available yet.