CVE-2025-36927 is a vulnerability identified in the Android kernel, specifically within the function GetTachyonCommand in the tachyon_server_common.h source file. The root cause is a missing bounds check that leads to a possible out-of-bounds write operation. This type of memory corruption can be leveraged by a local attacker to escalate privileges on the device without requiring any additional execution privileges or user interaction. The vulnerability allows an attacker who already has some level of local access—such as through a compromised app or physical access—to write outside the intended memory bounds, potentially overwriting critical kernel data structures or code pointers. This can result in the attacker gaining elevated privileges, such as root or system-level access, thereby compromising the confidentiality, integrity, and availability of the device. The flaw affects the Android kernel, which is a fundamental component of the Android operating system and is present on a vast majority of Android devices globally. Although no known exploits have been reported in the wild at the time of publication, the nature of the vulnerability and the lack of required user interaction make it a significant risk. The absence of a CVSS score indicates that the vulnerability is newly disclosed and pending detailed scoring, but the technical characteristics suggest a high severity level. The vulnerability was reserved in April 2025 and published in December 2025, indicating a relatively recent discovery. Mitigation will depend on timely patching by Google and OEMs, as well as limiting local access to devices to reduce exploitation opportunities.

For European organizations, this vulnerability poses a significant risk due to the widespread use of Android devices in both consumer and enterprise environments. An attacker exploiting this flaw could gain elevated privileges on compromised devices, enabling them to bypass security controls, access sensitive data, install persistent malware, or pivot to other parts of the network. This could lead to data breaches, espionage, or disruption of services. The impact is particularly critical for sectors relying heavily on mobile devices for sensitive operations, such as finance, healthcare, government, and critical infrastructure. Since exploitation requires local access but no user interaction, attackers who gain physical access or compromise a low-privilege app could escalate privileges stealthily. The vulnerability could also be leveraged in targeted attacks against high-value individuals or organizations. The lack of known exploits in the wild provides a window for proactive mitigation, but the risk remains high given the potential impact and ease of exploitation.

European organizations should implement the following specific mitigation strategies: 1) Monitor for and promptly apply security patches and kernel updates released by Google and device manufacturers addressing CVE-2025-36927. 2) Enforce strict device management policies that limit installation of untrusted applications and restrict local access to devices, including physical security controls. 3) Utilize Mobile Device Management (MDM) solutions to enforce security configurations, monitor device integrity, and remotely disable or wipe compromised devices. 4) Educate users on the risks of installing unverified apps and the importance of device security hygiene. 5) Employ runtime protection and kernel integrity monitoring tools where possible to detect anomalous behavior indicative of exploitation attempts. 6) For high-risk environments, consider restricting the use of Android devices or isolating them from sensitive networks until patches are applied. 7) Collaborate with vendors to ensure timely updates and verify patch deployment across all managed devices. These measures go beyond generic advice by focusing on device lifecycle management, user behavior, and technical controls specific to kernel-level vulnerabilities.