CVE-2025-26455 is a heap buffer overflow vulnerability located in multiple functions within the NdkMediaCodec.cpp component of Google Android operating system versions 13, 14, and 15. The flaw stems from improper bounds checking leading to an out-of-bounds write on the heap, which can corrupt memory and enable an attacker to escalate privileges locally. The vulnerability is classified under CWE-122 (Heap-based Buffer Overflow), indicating a memory safety issue that can be exploited to alter program control flow or data. Exploitation does not require additional execution privileges beyond those the attacker already possesses, nor does it require user interaction, making it easier to exploit in scenarios where an attacker has local access. The CVSS v3.1 base score is 7.8 (high), reflecting the significant impact on confidentiality, integrity, and availability, combined with relatively low attack complexity and privileges required. Although no public exploits have been reported yet, the vulnerability poses a serious risk especially in environments where untrusted local code execution is possible. The affected component, NdkMediaCodec, is part of Android's native media codec framework, which is widely used across Android devices, increasing the scope of potential impact.

The vulnerability allows local attackers to escalate privileges on affected Android devices, potentially gaining unauthorized access to sensitive data, modifying system files, or disrupting device functionality. This can lead to full device compromise, undermining user privacy and security. Organizations relying on Android devices for sensitive communications or operations may face data breaches, unauthorized access to corporate resources, or disruption of mobile services. The lack of need for user interaction increases the risk of automated or stealthy exploitation in environments where local access is possible, such as shared devices or compromised applications. The broad range of affected Android versions means a large number of devices worldwide are vulnerable until patches are applied. This can impact enterprises, government agencies, and individual users, particularly in sectors where mobile device security is critical.

Organizations and users should monitor for official security patches from Google and apply them promptly once available. Until patches are released, enforcing strict local access controls is critical to prevent untrusted users or applications from executing code locally. Employing application sandboxing and restricting installation of untrusted apps can reduce exploitation risk. Security teams should audit devices for signs of local compromise and consider deploying endpoint detection and response (EDR) solutions capable of identifying abnormal privilege escalation behaviors. Developers should review usage of native media codec components and avoid exposing vulnerable interfaces to untrusted inputs. Additionally, organizations should educate users about the risks of installing unverified applications and maintain up-to-date device inventories to prioritize patch management.