Use After Free in Facebook Hermes
CVE-2023-30470
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.012 (69.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Facebook Hermes — versions 0
Weakness classification (CWE)
References
- www.facebook.com/security/advisories/cve-2023-30470 (Patch, Vendor Advisory)
- github.com/facebook/hermes/commit/da8990f737ebb9d9810633502f65ed462b819c09 (Patch)
Frequently asked questions
- What is CVE-2023-30470?
- CVE-2023-30470 is a critical-severity vulnerability in Facebook Hermes, classified under Use After Free. CVSS score: 9.8/10. Published 2023-05-18.
- How severe is CVE-2023-30470?
- Critical severity. CVSS v3 base score is 9.8 out of 10.