{"id":49709,"date":"2025-06-08T12:55:02","date_gmt":"2025-06-08T12:55:02","guid":{"rendered":""},"modified":"2025-09-26T14:05:06","modified_gmt":"2025-09-26T20:05:06","slug":"cve-2025-2509-out-of-bounds-read-vulnerability-in-virglrenderer-in-chromeos","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-2509-out-of-bounds-read-vulnerability-in-virglrenderer-in-chromeos\/","title":{"rendered":"<strong>CVE-2025-2509: Out-of-Bounds Read Vulnerability in Virglrenderer in ChromeOS<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The world of cybersecurity is fraught with various vulnerabilities and exploits. In this blog post, we will delve into a particular vulnerability, CVE-2025-2509, which affects Virglrenderer in ChromeOS. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48383-django-select2-vulnerability-risking-data-leakage-and-unauthorized-access\/\"  data-wpil-monitor-id=\"56093\">vulnerability exposes systems to potential compromise and data leakage<\/a>, a cause for concern for all who utilize ChromeOS. It is of paramount importance, therefore, to understand the intricacies of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5100-a-double-free-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"56621\">vulnerability and the steps necessary to mitigate its potential<\/a> impacts.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-2509<br \/>\nSeverity: High (7.8 CVSS Score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32309-potential-system-compromise-due-to-remote-file-inclusion-in-php-program\/\"  data-wpil-monitor-id=\"56268\">Potential system compromise<\/a> or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-723961578\" 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>ChromeOS | 16093.57.0<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit manipulates the Virglrenderer, a component in ChromeOS, which is responsible for emulating a GPU. A malicious guest VM can craft specific vertex elements data that causes an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-1883-out-of-bounds-write-vulnerability-in-solidworks-edrawings-obj-file-reading-procedure\/\"  data-wpil-monitor-id=\"58182\">out-of-bounds read<\/a> in util_format_description. With this, an attacker can achieve arbitrary address <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48881-unauthorized-access-and-modification-vulnerability-in-valtimo-business-process-automation\/\"  data-wpil-monitor-id=\"57383\">access within the crosvm sandboxed process<\/a>. Ultimately, this can potentially lead to a VM escape, giving the attacker an opportunity to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31263-critical-memory-handling-vulnerability-could-lead-to-system-compromise-or-data-leakage-in-macos-sequoia-15-4\/\"  data-wpil-monitor-id=\"57384\">compromise the system or leak data<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1267650150\" 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>Due to the nature of this exploit, a direct <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6162-critical-buffer-overflow-vulnerability-in-totolink-ex1200t-http-post-request-handler\/\"  data-wpil-monitor-id=\"80010\">HTTP request<\/a> or shell command does not adequately represent how it works. However, the following pseudocode gives a high-level view of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45997-exploiting-file-upload-vulnerability-in-web-based-pharmacy-product-management-system\/\"  data-wpil-monitor-id=\"57385\">vulnerability might be exploited<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\"># Create a malicious vertex elements data\nmalicious_data = create_malicious_data()\n# Trigger an out-of-bounds read in util_format_description\ntrigger_oob_read(malicious_data)\n# Achieve arbitrary address access within the crosvm sandboxed process\naccess_address = get_address_access()\n# Perform VM escape\nvm_escape(access_address)<\/code><\/pre>\n<p>This pseudocode is not intended to be functional but rather serves to provide a conceptual understanding of the exploit.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The most effective mitigation for this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49002-critical-vulnerability-in-dataease-bypassing-patch-for-cve-2025-32966\/\"  data-wpil-monitor-id=\"80011\">vulnerability is to apply the vendor-provided patch<\/a> as soon as it becomes available. Until then, temporary mitigations such as employing a web application firewall (WAF) or an intrusion detection system (IDS) can help protect against <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-7457-macos-authorization-model-exploit-leading-to-potential-mitm-attacks\/\"  data-wpil-monitor-id=\"80009\">potential exploits<\/a>. Additionally, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6791-sql-injection-vulnerability-in-centreon-web-monitoring-event-logs-module\/\"  data-wpil-monitor-id=\"84126\">monitor system logs<\/a> and network traffic for any unusual activity, which could be indicative of an exploit attempt.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The world of cybersecurity is fraught with various vulnerabilities and exploits. In this blog post, we will delve into a particular vulnerability, CVE-2025-2509, which affects Virglrenderer in ChromeOS. This vulnerability exposes systems to potential compromise and data leakage, a cause for concern for all who utilize ChromeOS. It is of paramount importance, therefore, to [&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-49709","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\/49709","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=49709"}],"version-history":[{"count":7,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49709\/revisions"}],"predecessor-version":[{"id":76909,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49709\/revisions\/76909"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=49709"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=49709"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=49709"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=49709"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=49709"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=49709"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=49709"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=49709"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=49709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}