{"id":59703,"date":"2025-07-28T10:41:39","date_gmt":"2025-07-28T10:41:39","guid":{"rendered":""},"modified":"2025-10-02T05:37:03","modified_gmt":"2025-10-02T11:37:03","slug":"cve-2025-1246-memory-buffer-overrun-vulnerability-in-arm-gpu-userspace-drivers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-1246-memory-buffer-overrun-vulnerability-in-arm-gpu-userspace-drivers\/","title":{"rendered":"CVE-2025-1246: Memory Buffer Overrun Vulnerability in Arm GPU Userspace Drivers<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The CVE-2025-1246 vulnerability is a critical security flaw found in Arm Ltd’s Bifrost, Valhall, and Arm 5th Gen GPU Architecture Userspace Drivers. This flaw allows a non-privileged user process to perform valid GPU processing operations, such as through WebGL or WebGPU, and potentially access outside of buffer bounds. This could lead to a system<\/a> compromise or data leakage, putting sensitive data at risk. Given the widespread use of Arm’s GPU drivers in various devices and systems, the impact of this vulnerability<\/a> could be significant if left unpatched.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-1246
\nSeverity: High (CVSS: 7.8)
\nAttack Vector: Local
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: System Compromise<\/a>, Data Leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Bifrost GPU Userspace Driver<\/a> | r18p0 through r49p3, r50p0 through r51p0
\nValhall GPU Userspace Driver | r28p0 through r49p3, r50p0 through r54p0
\nArm 5th Gen GPU Architecture Userspace Driver | r41p0 through r49p3, r50p0 through r54p0<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit takes advantage of the improper restriction of operations within the bounds of a memory buffer<\/a> in the affected GPU drivers. An attacker would typically craft a specific GPU processing operation, such as a WebGL or WebGPU command, that forces the GPU to write or read outside of its designated memory<\/a> buffer. This could lead to a buffer<\/a> overrun or underrun, allowing the attacker to execute code, alter existing data, or extract sensitive information from the system.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

A hypothetical exploit might involve a malicious WebGL script that triggers the vulnerability<\/a>. The script could look something like this:<\/p>\n

let canvas = document.createElement('canvas');\nlet gl = canvas.getContext('webgl');\nlet buffer = gl.createBuffer();\ngl.bindBuffer(gl.ARRAY_BUFFER, buffer);\ngl.bufferData(gl.ARRAY_BUFFER, new Float32Array([1.0, 2.0, 3.0, 4.0]), gl.STATIC_DRAW);\n\/\/ The following command attempts to read beyond the buffer's bounds\ngl.getBufferSubData(gl.ARRAY_BUFFER, 5000, new Float32Array(1));<\/code><\/pre>\n
This code creates a buffer with 4 floating-point values, but then attempts to read data from a location far beyond the buffer’s bounds, potentially accessing sensitive data<\/a> or triggering unwanted behavior in the GPU userspace driver.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The CVE-2025-1246 vulnerability is a critical security flaw found in Arm Ltd’s Bifrost, Valhall, and Arm 5th Gen GPU Architecture Userspace Drivers. This flaw allows a non-privileged user process to perform valid GPU processing operations, such as through WebGL or WebGPU, and potentially access outside of buffer bounds. This could lead to a system […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-59703","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t