CVE-2023-30470

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 2.20% Top 20%
Vendor Advisory facebook.com
Affected: Facebook Hermes
Published at:
Updated at:

References

Link Tags
https://www.facebook.com/security/advisories/cve-2023-30470 patch vendor advisory
https://github.com/facebook/hermes/commit/da8990f737ebb9d9810633502f65ed462b819c09 patch

Frequently Asked Questions

What is the severity of CVE-2023-30470?
CVE-2023-30470 has been scored as a critical severity vulnerability.
How to fix CVE-2023-30470?
To fix CVE-2023-30470, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-30470 being actively exploited in the wild?
It is possible that CVE-2023-30470 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-30470?
CVE-2023-30470 affects Facebook Hermes.
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