CVE-2023-23556

2023-05-1821:16:43

facebook

www.cve.org

bigint conversion

hermes

code execution

out-of-bound write

malicious attacker

react native

9.9 High

AI Score

Confidence

High

0.004 Low

EPSS

Percentile

74.2%

JSON

An error in BigInt conversion to Number in Hermes prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80 could have been used by a malicious attacker to execute arbitrary code due to an out-of-bound write. Note that this bug is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "Hermes",
    "vendor": "Facebook",
    "versions": [
      {
        "lessThan": "a6dcafe6ded8e61658b40f5699878cd19a481f80",
        "status": "affected",
        "version": "0",
        "versionType": "git"
      }
    ]
  }
]