CVE-2023-23556

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Source
https://cve.org/CVERecord?id=CVE-2023-23556
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-23556.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-23556
Published
2023-05-18T21:16:43.874Z
Modified
2026-08-12T13:33:51.415050Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23556.json",
    "cna_assigner": "facebook",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "a6dcafe6ded8e61658b40f5699878cd19a481f80"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/facebook/hermes

Affected ranges

Type
GIT
Repo
https://github.com/facebook/hermes
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a6dcafe6ded8e61658b40f5699878cd19a481f80
Database specific
Show details 
{
    "source": "REFERENCES"
}

Affected versions

hermes-2022-04-28-RNv0.*
hermes-2022-04-28-RNv0.69.0-15d07c2edd29a4ea0b8f15ab0588a0c1adb1200f
hermes-2022-07-15-RNv0.*
hermes-2022-07-15-RNv0.70.0-88dd5731a19ab6b38b0a0a2d4386ba959f2a2c98
hermes-2022-11-03-RNv0.*
hermes-2022-11-03-RNv0.71.0-85613e1f9d1216f2cce7e54604be46057092939d
v0.*
v0.1.0
v0.1.1
v0.10.0
v0.11.0
v0.12.0
v0.2.1
v0.3.0
v0.4.0
v0.5.0
v0.6.0
v0.7.0
v0.8.0
v0.9.0

Database specific

vanir_signatures_modified 
"2026-08-12T13:33:51Z"
vanir_signatures 
[
    {
        "id": "CVE-2023-23556-145a8f24",
        "deprecated": false,
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "116023603249055942204871578289526150818",
                "157465235683486666630666541987617012353",
                "324844226610994754364777013170485823662",
                "305436130329384601449460512141132589680",
                "256784880773286649680719239257047737024"
            ]
        },
        "source": "https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80",
        "target": {
            "file": "lib/VM/Operations.cpp"
        }
    },
    {
        "id": "CVE-2023-23556-1b1293fa",
        "deprecated": false,
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "length": 281.0,
            "function_hash": "182465140115176206595651731294451484989"
        },
        "source": "https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80",
        "target": {
            "function": "toDouble",
            "file": "lib/Support/BigIntSupport.cpp"
        }
    },
    {
        "id": "CVE-2023-23556-26f67e81",
        "deprecated": false,
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "159108049424863460441355083818936485829",
                "160020135003896613308550930136518706150",
                "312483450123792388199485599228294266894",
                "30932606837278682447139067601811061633"
            ]
        },
        "source": "https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80",
        "target": {
            "file": "lib/Support/BigIntSupport.cpp"
        }
    },
    {
        "id": "CVE-2023-23556-e833c902",
        "deprecated": false,
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "327584473803952423536992197582374868669",
                "7771634333197280731037778234458644585",
                "94602761196101625413231949479955562725",
                "246489650203966278907648881022758586812",
                "181586388229243172966848421284771673939",
                "335352610645303177993059854685458401532",
                "305482378050391684812655155477165124418",
                "5595740571188832623618342286973301592",
                "278285489027415498589782065420222616769",
                "44085747458836909365017973400137115795"
            ]
        },
        "source": "https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80",
        "target": {
            "file": "lib/VM/JSLib/Array.cpp"
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-23556.json"