{"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":"<strong>CVE-2025-1246: Memory Buffer Overrun Vulnerability in Arm GPU Userspace Drivers<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-1246 vulnerability is a critical security flaw found in Arm Ltd&#8217;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 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7793-critical-vulnerability-in-tenda-fh451-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"68543\">lead to a system<\/a> compromise or data leakage, putting sensitive data at risk. Given the widespread use of Arm&#8217;s GPU drivers in various devices and systems, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30403-heap-buffer-overflow-vulnerability-in-mvfst-impacts-quic-sessions\/\"  data-wpil-monitor-id=\"82337\">impact of this vulnerability<\/a> could be significant if left unpatched.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-1246<br \/>\nSeverity: High (CVSS: 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8040-memory-safety-bugs-causing-potential-system-compromise-in-firefox-and-thunderbird\/\"  data-wpil-monitor-id=\"71234\">System Compromise<\/a>, Data Leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3594505755\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>Bifrost <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-36342-heap-overflow-vulnerability-in-gpu-driver-leading-to-potential-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"87459\">GPU Userspace Driver<\/a> | r18p0 through r49p3, r50p0 through r51p0<br \/>\nValhall GPU Userspace Driver | r28p0 through r49p3, r50p0 through r54p0<br \/>\nArm 5th Gen GPU Architecture Userspace Driver | r41p0 through r49p3, r50p0 through r54p0<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of the improper restriction of operations within the bounds of a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46713-buffer-overflow-vulnerability-in-sandboxie-s-memory-allocation-subsystem\/\"  data-wpil-monitor-id=\"68542\">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 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30419-memory-corruption-vulnerability-in-ni-circuit-design-suite\/\"  data-wpil-monitor-id=\"68138\">designated memory<\/a> buffer. This could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7460-critical-vulnerability-in-totolink-t6-leads-to-buffer-overflow\/\"  data-wpil-monitor-id=\"66919\">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<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1060309642\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>A hypothetical exploit might involve a malicious WebGL <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53084-critical-cross-site-scripting-vulnerability-in-wwbn-avideo-14-4\/\"  data-wpil-monitor-id=\"68060\">script that triggers the vulnerability<\/a>. The script could look something like this:<\/p>\n<pre><code class=\"\" data-line=\"\">let canvas = document.createElement(&#039;canvas&#039;);\nlet gl = canvas.getContext(&#039;webgl&#039;);\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&#039;s bounds\ngl.getBufferSubData(gl.ARRAY_BUFFER, 5000, new Float32Array(1));<\/code><\/pre>\n<p>This code creates a buffer with 4 floating-point values, but then attempts to read data from a location far beyond the buffer&#8217;s bounds, potentially accessing <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43233-critical-https-proxy-vulnerability-allowing-sensitive-data-access\/\"  data-wpil-monitor-id=\"69385\">sensitive data<\/a> or triggering unwanted behavior in the GPU userspace driver.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-1246 vulnerability is a critical security flaw found in Arm Ltd&#8217;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 [&hellip;]<\/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,"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":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=59703"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59703\/revisions"}],"predecessor-version":[{"id":80294,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59703\/revisions\/80294"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59703"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59703"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59703"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59703"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59703"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59703"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}