{"id":63974,"date":"2025-08-11T08:47:03","date_gmt":"2025-08-11T08:47:03","guid":{"rendered":""},"modified":"2025-10-04T09:11:29","modified_gmt":"2025-10-04T15:11:29","slug":"cve-2025-6693-critical-memory-corruption-vulnerability-in-rt-thread","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6693-critical-memory-corruption-vulnerability-in-rt-thread\/","title":{"rendered":"<strong>CVE-2025-6693: Critical Memory Corruption Vulnerability in RT-Thread<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-6693 is a critical vulnerability discovered in the RT-Thread real-time operating system, specifically versions up to 5.1.0. This vulnerability, found in the core device driver code, can lead to memory corruption that can potentially compromise the system or result in data leakage. The exploit can be launched from the local host, making any <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47136-integer-underflow-vulnerability-in-indesign-desktop-versions-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"79745\">system running affected versions<\/a> of RT-Thread prone to the attack. The significance of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43275-critical-race-condition-vulnerability-in-macos\/\"  data-wpil-monitor-id=\"71626\">vulnerability is emphasized by the Critical<\/a> Vulnerability Scoring System (CVSS) rating of 7.8, indicating a severe threat to system integrity and security.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6693<br \/>\nSeverity: Critical (CVSS: 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Not required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27055-memory-corruption-leads-to-potential-system-compromise-during-image-encoding\/\"  data-wpil-monitor-id=\"74171\">System compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2190032225\" 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>RT-Thread | Up to 5.1.0<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52239-arbitrary-file-upload-vulnerability-in-zkeacms-v4-1\/\"  data-wpil-monitor-id=\"74580\">vulnerability resides in the sys_device_open\/sys_device_read\/sys_device_control\/sys_device_init\/sys_device_close\/sys_device_write functions of the device.c file<\/a> in the RT-Thread&#8217;s device drivers. An attacker can manipulate these functions to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27031-memory-corruption-via-ioctl-commands-processing\/\"  data-wpil-monitor-id=\"71574\">corrupt the memory<\/a> of the system. While the exact technical details of the manipulation are not disclosed to avoid misuse, the result is a destabilized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27050-memory-corruption-vulnerability-leading-to-potential-system-compromise-and-data-leakage\/\"  data-wpil-monitor-id=\"74748\">system that can potentially be compromised or leak sensitive data<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1304353883\" 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>While a precise exploit code for CVE-2025-6693 is not available, a conceptual example of how such a vulnerability might be exploited is shown below:<\/p>\n<pre><code class=\"\" data-line=\"\">$ .\/exploit RT-Thread_vuln_exploit.c\nTargeting sys_device_open function at memory address: 0x12345678\nSending crafted input...\nMemory corruption achieved. Proceeding with system compromise...<\/code><\/pre>\n<p>This example demonstrates a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-0078-selinux-bypass-exploitation-leads-to-local-privilege-escalation\/\"  data-wpil-monitor-id=\"88897\">local exploit<\/a> where a malignant script (RT-Thread_vuln_exploit.c) is run on the target system. The script targets vulnerable system functions, sends manipulated inputs, and achieves <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27042-a-critical-memory-corruption-vulnerability-in-video-processing\/\"  data-wpil-monitor-id=\"74070\">memory corruption<\/a>.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>Given the critical severity of CVE-2025-6693, users are urged to apply patches as soon as they are available from the vendor. As of writing, the vendor has not responded to the disclosure. In the interim, users can employ Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) as temporary mitigation measures. However, these should not be seen as long-term solutions, and the application of official patches should be prioritized as soon as they are released.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-6693 is a critical vulnerability discovered in the RT-Thread real-time operating system, specifically versions up to 5.1.0. This vulnerability, found in the core device driver code, can lead to memory corruption that can potentially compromise the system or result in data leakage. The exploit can be launched from the local host, making any 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-63974","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\/63974","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=63974"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/63974\/revisions"}],"predecessor-version":[{"id":81708,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/63974\/revisions\/81708"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=63974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=63974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=63974"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=63974"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=63974"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=63974"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=63974"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=63974"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=63974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}