{"id":84698,"date":"2025-10-27T11:36:14","date_gmt":"2025-10-27T11:36:14","guid":{"rendered":""},"modified":"2025-10-29T17:20:30","modified_gmt":"2025-10-29T23:20:30","slug":"cve-2025-26436-local-privilege-escalation-through-bal-bypass-in-pendingintentrecord-java","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-26436-local-privilege-escalation-through-bal-bypass-in-pendingintentrecord-java\/","title":{"rendered":"<strong>CVE-2025-26436: Local Privilege Escalation through BAL Bypass in PendingIntentRecord.java<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-26436 is a high-risk vulnerability that could potentially allow an application to launch an activity from the background due to BAL Bypass in PendingIntentRecord.java. This could lead to a local escalation of privilege without requiring additional execution privileges. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30382-untrusted-data-deserialization-vulnerability-in-microsoft-office-sharepoint\/\"  data-wpil-monitor-id=\"91846\">vulnerability poses a significant risk to any system or data<\/a> it affects as it could lead to a full system compromise or leakage of sensitive data.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-26436<br \/>\nSeverity: High (7.8 CVSS)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Local Privilege Escalation, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20681-wlan-ap-driver-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"91609\">Potential System<\/a> Compromise, Data Leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3108671923\" 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>Android OS | All versions prior to Vendor Patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by taking advantage of the clearAllowBgActivityStarts function in PendingIntentRecord.java. The function does not properly restrict the launching of background activities, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20682-critical-wlan-ap-driver-vulnerability-allowing-potential-local-privilege-escalation\/\"  data-wpil-monitor-id=\"91815\">allowing an application to potentially<\/a> execute activities in the background. This could be used by a malicious application to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20683-local-privilege-escalation-due-to-incorrect-bounds-check-in-wlan-ap-driver\/\"  data-wpil-monitor-id=\"91784\">escalate its privileges locally<\/a> without requiring additional execution privileges or user interaction.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2590976658\" 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 conceptual example of how this exploit might work is not provided due to the potential misuse of such information. However, it involves a malicious application exploiting the clearAllowBgActivityStarts function to initiate background activities and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30385-critical-privilege-escalation-vulnerability-in-windows-common-log-file-system-driver\/\"  data-wpil-monitor-id=\"91839\">escalate its privileges<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">\/\/ Pseudocode for malicious activity\npublic class MaliciousActivity extends Activity {\n@Override\nprotected void onCreate(Bundle savedInstanceState) {\nsuper.onCreate(savedInstanceState);\n\/\/ Exploit clearAllowBgActivityStarts to start activity in background\nIntent intent = new Intent(this, ExploitActivity.class);\nstartService(intent);\n}\n}<\/code><\/pre>\n<p>Please note that the above is a simplified and hypothetical example. The actual exploit would likely involve a more complex sequence of operations.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To mitigate this vulnerability, users are advised to apply the latest vendor patches once they become available. In the interim, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation by detecting and blocking attempts to exploit this vulnerability. However, these are not substitute for a proper patch and should be used as a temporary measure only.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-26436 is a high-risk vulnerability that could potentially allow an application to launch an activity from the background due to BAL Bypass in PendingIntentRecord.java. This could lead to a local escalation of privilege without requiring additional execution privileges. This vulnerability poses a significant risk to any system or data it affects as it could [&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":[91],"product":[],"attack_vector":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-84698","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-google","attack_vector-privilege-escalation"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/84698","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=84698"}],"version-history":[{"count":5,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/84698\/revisions"}],"predecessor-version":[{"id":85024,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/84698\/revisions\/85024"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=84698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=84698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=84698"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=84698"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=84698"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=84698"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=84698"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=84698"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=84698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}