CVE-2025-48581 in Android
Summary
by MITRE • 09/04/2025
In VerifyNoOverlapInSessions of apexd.cpp, there is a possible way to block security updates due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 06/02/2026
The vulnerability identified as CVE-2025-48581 resides within the apexd.cpp source file in the VerifyNoOverlapInSessions function, representing a critical logic flaw that undermines system security integrity. This issue manifests as a potential denial of service condition that can prevent security updates from being properly applied, thereby creating a persistent security weakness that remains undetected and unaddressed. The flaw operates at a fundamental level within the system's update mechanism, where the logic error creates a condition that allows malicious actors to effectively block legitimate security patches from executing. The vulnerability's classification as a local privilege escalation vector indicates that an attacker with minimal system access can leverage this flaw to gain elevated privileges without requiring additional execution capabilities or user interaction, making it particularly dangerous in environments where privilege separation is expected to provide security boundaries.
The technical implementation of this vulnerability stems from a logic error within the session overlap verification process that governs how security updates are applied across different system sessions. When the VerifyNoOverlapInSessions function processes session management operations, it fails to properly validate or handle certain edge cases that should prevent concurrent access conflicts during update operations. This logical failure creates a scenario where the system's update mechanism becomes blocked or stalled, preventing new security patches from being installed even when they are available and ready for deployment. The flaw essentially creates a deadlock condition within the update subsystem, where legitimate update processes become indefinitely suspended due to improper session handling logic. This represents a CWE-362 weakness in concurrent execution handling, specifically related to race conditions and improper synchronization mechanisms that should prevent overlapping operations during critical system maintenance.
The operational impact of CVE-2025-48581 extends beyond simple denial of service, as it creates a persistent security gap that can remain undetected for extended periods while leaving systems vulnerable to attacks. The local privilege escalation capability means that an attacker can exploit this vulnerability to gain elevated system privileges, potentially allowing access to sensitive system resources, modification of critical security configurations, or even complete system compromise. The absence of user interaction requirements for exploitation makes this vulnerability particularly concerning as it can be triggered automatically without requiring any human intervention, enabling automated attack scenarios that can propagate across multiple systems. Security updates that should be automatically applied become blocked, leaving systems exposed to known vulnerabilities while the system continues to operate normally, creating a false sense of security that masks the underlying threat. This vulnerability can be particularly devastating in enterprise environments where automated patch management is relied upon for maintaining security posture.
Mitigation strategies for CVE-2025-48581 should focus on immediate code-level fixes that address the specific logic error within the VerifyNoOverlapInSessions function, implementing proper session validation and synchronization mechanisms to prevent the blocking conditions that enable privilege escalation. System administrators should prioritize patching affected systems and monitor for any signs of exploitation attempts or abnormal update behavior that might indicate the vulnerability is being actively targeted. The remediation approach should include implementing proper access controls and privilege separation measures that limit the potential impact of successful exploitation attempts, while also establishing monitoring procedures that can detect when update processes are being blocked or delayed. Organizations should also consider implementing additional security controls such as runtime integrity checks and automated alerting systems that can detect when security update mechanisms are being compromised, aligning with ATT&CK technique T1070.004 for Indicator Removal on Host and T1543.003 for Taint/Corruption of Update Systems. Regular security assessments and penetration testing should be conducted to verify that the implemented fixes effectively resolve the underlying logic error and prevent exploitation attempts.