CVE-2025-36922 is a vulnerability identified in the Android kernel's bigo_map function within the bigo_iommu.c source file. The root cause is a use-after-free condition (CWE-416), where memory is accessed after it has been freed, leading to potential information disclosure. This flaw can be exploited by a local attacker who already has system execution privileges to escalate their privileges to the kernel level, effectively gaining full control over the device. The attack vector is local (AV:L), requiring low attack complexity (AC:L) but high privileges (PR:H) initially, and no user interaction (UI:N) is needed. The vulnerability affects confidentiality, integrity, and availability (all rated high), making it a critical concern for device security. The Android kernel is a core component of the operating system, and a kernel-level compromise can bypass most security mechanisms, allowing attackers to install persistent malware, access sensitive data, or disrupt device operations. Although no known exploits are currently reported in the wild, the lack of patches and the severity of the flaw necessitate proactive defensive measures. The vulnerability was publicly disclosed on December 11, 2025, and is tracked under CVE-2025-36922 with a CVSS v3.1 score of 6.7, categorized as medium severity. The absence of patches means affected organizations must rely on mitigation strategies until updates are available.

For European organizations, this vulnerability poses a significant risk to the security of Android devices used within corporate environments, including smartphones, tablets, and embedded systems. Successful exploitation could allow attackers to gain kernel-level privileges, leading to full device compromise, unauthorized data access, and potential lateral movement within corporate networks. This is particularly concerning for sectors relying heavily on mobile devices for sensitive communications, such as finance, healthcare, and government. The confidentiality, integrity, and availability of data on affected devices could be severely impacted. Additionally, the vulnerability could be leveraged to bypass mobile device management (MDM) controls and security policies, undermining organizational security postures. The lack of user interaction requirement increases the risk of automated or stealthy exploitation by malicious insiders or malware already present on devices. Organizations with Bring Your Own Device (BYOD) policies may face increased exposure due to diverse device management and patching challenges.

Until official patches are released, European organizations should implement strict access controls to limit local system access to trusted users only, reducing the risk of exploitation. Employ kernel hardening techniques such as enabling Kernel Address Space Layout Randomization (KASLR) and Kernel Page-Table Isolation (KPTI) where supported to mitigate exploitation impact. Monitor device logs and behavior for signs of privilege escalation attempts or unusual kernel activity. Enforce strong endpoint security policies including regular device audits, disabling unnecessary services, and restricting installation of untrusted applications. Utilize Mobile Threat Defense (MTD) solutions that can detect anomalous behavior indicative of kernel exploits. Prepare for rapid deployment of patches by maintaining an up-to-date inventory of affected devices and establishing clear update procedures. Educate users and administrators about the risks of local privilege escalation vulnerabilities and the importance of device security hygiene. Consider isolating critical systems from devices that cannot be promptly updated or monitored effectively.