{"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":"CVE-2025-26436: Local Privilege Escalation through BAL Bypass in PendingIntentRecord.java<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

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<\/a> it affects as it could lead to a full system compromise or leakage of sensitive data.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-26436
\nSeverity: High (7.8 CVSS)
\nAttack Vector: Local
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Local Privilege Escalation, Potential System<\/a> Compromise, Data Leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Android OS | All versions prior to Vendor Patch<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit works by taking advantage of the clearAllowBgActivityStarts function in PendingIntentRecord.java. The function does not properly restrict the launching of background activities, allowing an application to potentially<\/a> execute activities in the background. This could be used by a malicious application to escalate its privileges locally<\/a> without requiring additional execution privileges or user interaction.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

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 escalate its privileges<\/a>.<\/p>\n

\/\/ 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
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
Mitigation Guidance<\/strong><\/p>\n
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":"
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 […]<\/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,"_monsterinsights_skip_tracking":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":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t