CVE-2023-24833

moderate-risk
Published 2023-05-18

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.

Do I need to act?

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0.27% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Facebook

References (4)

Patch https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f...
Patch https://www.facebook.com/security/advisories/cve-2023-24833
Patch https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f...
Patch https://www.facebook.com/security/advisories/cve-2023-24833
32
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal