Use After Free in Facebook Hermes
CVE-2023-24833
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (50.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Facebook Hermes — versions 0
Weakness classification (CWE)
References
- www.facebook.com/security/advisories/cve-2023-24833 (Patch, Vendor Advisory)
- github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80 (Patch)
Frequently asked questions
- What is CVE-2023-24833?
- CVE-2023-24833 is a high-severity vulnerability in Facebook Hermes, classified under Use After Free. CVSS score: 7.5/10. Published 2023-05-18.
- How severe is CVE-2023-24833?
- High severity. CVSS v3 base score is 7.5 out of 10.