Use-after-free in js_print_object in QuickJS_CVE-2025-62490

8.8 / 10

HIGH

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

Description

In quickjs, in js_print_object, when printing an array, the function first fetches the array length and then loops over it. The issue is, printing a value is not side-effect free. An attacker-defined callback could run during js_print_value, during which the array could get resized and len1 become out of bounds. This results in a use-after-free.A second instance occurs in the same function during printing of a map or set objects. The code iterates over ms->records list, but once again, elements could be removed from the list during js_print_value call.

Basic Information

ID CVE-2025-62490

Source Google

Published Oct 16, 2025 at 15:51

Affected Product

Vendor QuickJS

Product QuickJS

Version 2025-04-26

Affected Versions QuickJS QuickJS 2025-04-26

CWE Classification

CWE-416

References

{
    "lastseen": "",
    "description": "In quickjs, in js_print_object, when printing an array, the function first fetches the array length and then loops over it.\u00a0The issue is, printing a value is not side-effect free. An attacker-defined callback could run during js_print_value, during which the array could get resized and len1\u00a0become out of bounds. This results in a use-after-free.A second instance occurs in the same function during printing of a map or set objects. The code iterates over ms->records\u00a0list, but once again, elements could be removed from the list during js_print_value\u00a0call.",
    "published": "2025-10-16T15:51:06.100Z",
    "modified": "2025-10-16T15:51:06.100Z",
    "type": "cve",
    "title": "Use-after-free in js_print_object in QuickJS",
    "source": "Google",
    "references": "https://bellard.org/quickjs/Changelog\nhttps://issuetracker.google.com/434196651",
    "id": "CVE-2025-62490",
    "bulletinFamily": "",
    "cwe": [
        "CWE-416"
    ],
    "cvelist": null,
    "sourceData": "QuickJS QuickJS 2025-04-26",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "QuickJS",
    "version": "2025-04-26",
    "vendor": "QuickJS",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}