{"id":49333,"date":"2025-06-06T15:38:28","date_gmt":"2025-06-06T15:38:28","guid":{"rendered":""},"modified":"2025-08-31T18:38:10","modified_gmt":"2025-09-01T00:38:10","slug":"cve-2025-22035-linux-kernel-uaf-vulnerability-in-print-graph-function-flags","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-22035-linux-kernel-uaf-vulnerability-in-print-graph-function-flags\/","title":{"rendered":"<strong>CVE-2025-22035: Linux Kernel UAF Vulnerability in print_graph_function_flags<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>Critical vulnerabilities in widely deployed software like the Linux kernel can have far-reaching consequences, affecting numerous systems and devices globally. CVE-2025-22035 is one such vulnerability. It affects the tracing functionality in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21879-the-linux-kernel-btrfs-use-after-free-vulnerability\/\"  data-wpil-monitor-id=\"56550\">Linux kernel<\/a>, a key component that enables developers to troubleshoot system issues and application performance. The vulnerability could potentially allow an attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41651-critical-system-compromise-due-to-missing-authentication\/\"  data-wpil-monitor-id=\"56049\">compromise systems<\/a> and leak data, making it a serious threat that needs immediate attention.<br \/>\nThe <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32289-high-severity-php-remote-file-inclusion-vulnerability-in-apustheme-yozi\/\"  data-wpil-monitor-id=\"56047\">vulnerability has been rated as high severity<\/a> (CVSS score of 7.8), signifying that its exploitation could have significant consequences. This blog post aims to provide a detailed breakdown of CVE-2025-22035, including its effects, how it can be exploited, and how to mitigate it.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-22035<br \/>\nSeverity: High, CVSS score: 7.8<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: Potential system compromise and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48383-django-select2-vulnerability-risking-data-leakage-and-unauthorized-access\/\"  data-wpil-monitor-id=\"56139\">data leakage<\/a><\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1259715198\" 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><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21893-critical-linux-kernel-vulnerability-in-key-put-function\/\"  data-wpil-monitor-id=\"56819\">Linux Kernel<\/a> | [Insert affected version]<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21999-use-after-free-vulnerability-in-linux-kernel\/\"  data-wpil-monitor-id=\"56833\">vulnerability arises from a use-after-free<\/a> (UAF) issue in the print_graph_function_flags() function within the Linux kernel&#8217;s tracing component. During ftrace stress testing, tracer switching only updates one of the two calls to print_graph_function_flags, leaving the second to use the print_line function of the old tracer.<br \/>\nWhen switching tracers, &#8216;iter->private&#8217; is freed but not set to NULL, providing an opportunity for an invalid &#8216;iter->private&#8217; to be used. This can lead to undefined behavior and potentially be exploited to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48828-arbitrary-php-code-execution-in-vbulletin-via-template-conditionals\/\"  data-wpil-monitor-id=\"55757\">execute arbitrary code<\/a> or cause a denial of service.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1368154926\" 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>Below is a conceptual example 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=\"57481\">vulnerability might be exploited<\/a>. This is not actual exploit code, but a representation of the steps an attacker might take.<\/p>\n<pre><code class=\"\" data-line=\"\"># Switch to the function_graph tracer\necho function_graph &gt; current_tracer\n# Start a background process that reads the trace\ncat trace &gt; \/dev\/null &amp;\n# Ensure the &#039;cat&#039; reaches the &#039;mdelay(10)&#039; point\nsleep 5\n# Switch to the &#039;timerlat&#039; tracer, triggering the vulnerability\necho timerlat &gt; current_tracer<\/code><\/pre>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The most effective mitigation for this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4578-sql-injection-vulnerability-in-file-provider-wordpress-plugin\/\"  data-wpil-monitor-id=\"58842\">vulnerability is to apply the patch provided<\/a> by the vendor. Users and administrators should update their <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-49840-in-depth-analysis-of-linux-kernel-vulnerability-and-its-mitigation\/\"  data-wpil-monitor-id=\"57480\">Linux kernels<\/a> to the latest patched version as soon as possible.<br \/>\nIn the meantime, or in situations where immediate patching is not feasible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These can help <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20217-denial-of-service-vulnerability-in-snort-3-detection-engine-of-cisco-secure-firewall-threat-defense-software\/\"  data-wpil-monitor-id=\"77070\">detect and block attempts to exploit the vulnerability<\/a>.<br \/>\nUnderstanding and addressing cybersecurity <a href=\"https:\/\/www.ameeba.com\/blog\/enhancing-cybersecurity-integrating-human-risk-management-with-security-awareness-training\/\"  data-wpil-monitor-id=\"56048\">vulnerabilities<\/a> like CVE-2025-22035 is crucial for maintaining the security and integrity of systems and data. Stay informed and proactive in your <a href=\"https:\/\/www.ameeba.com\/blog\/kettering-health-cybersecurity-incident-unpacking-the-potential-scam-texts-and-calls\/\"  data-wpil-monitor-id=\"55792\">cybersecurity practices to protect your systems against potential<\/a> threats.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Critical vulnerabilities in widely deployed software like the Linux kernel can have far-reaching consequences, affecting numerous systems and devices globally. CVE-2025-22035 is one such vulnerability. It affects the tracing functionality in the Linux kernel, a key component that enables developers to troubleshoot system issues and application performance. The vulnerability could potentially allow an attacker [&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":[88],"product":[95],"attack_vector":[87],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-49333","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-linux","product-linux-kernel","attack_vector-dos"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49333","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=49333"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49333\/revisions"}],"predecessor-version":[{"id":69451,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49333\/revisions\/69451"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=49333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=49333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=49333"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=49333"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=49333"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=49333"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=49333"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=49333"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=49333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}