CVE-2026-0153: Android Buffer Overflow Privilege Escalation (CVSS 7.8)

Technical summary

CVE-2026-0153 is an out-of-bounds write vulnerability (CWE-787) in the msg_to_host_buffer.cc file within Google Android. The root cause is an inadequate bounds check during write operations, permitting an attacker to overflow a heap or stack buffer. The vulnerability requires local code execution on the target device and a user account with standard privileges. Once triggered, it enables privilege escalation without additional exploitation stages or user awareness. The CVSS 3.1 score of 7.8 (HIGH) reflects the combination of local attack vector, low complexity, and unrestricted impact on confidentiality, integrity, and availability.

Business impact

Organizations deploying Android devices—whether as corporate endpoints, IoT infrastructure, or embedded systems—face elevated risk of unauthorized privilege escalation. A local attacker gaining higher privileges can access sensitive corporate data, modify system configurations, install persistent backdoors, or pivot to network resources. This is particularly concerning in BYOD environments, enterprise device management deployments, and Android-based industrial control systems where a compromised device becomes a pivot point for broader network attacks.

Affected systems

The vulnerability affects Google Android across versions where the affected code path in msg_to_host_buffer.cc remains unpatched. Verify the specific Android versions impacted and patching timelines through the official Google Android Security & Privacy Year in Review or the Android Security Bulletin for June 2026. All Android devices running vulnerable versions are potentially at risk if they execute code paths that trigger the bounds check failure.

Exploitability

Exploitation requires local code execution—the attacker must already have the ability to run code on the device, typically as an unprivileged user. No user interaction is needed to trigger the vulnerability once code execution is achieved. The attack complexity is low, meaning a working exploit does not require special conditions or race conditions. These factors make it an attractive vector for post-compromise privilege escalation or for lateral movement from a compromised application. The vulnerability is not yet tracked in CISA's Known Exploited Vulnerabilities (KEV) catalog, but its straightforward nature suggests weaponization is plausible.

Remediation

Patch Android devices to the fixed version released by Google for this vulnerability. Check the Android Security Bulletin for June 2026 to identify the specific security patch level and affected Android versions. Interim mitigations include restricting local code execution through SELinux policies, disabling unnecessary services that might be exploited as entry points, and enforcing strict app permission controls via device administration policies or mobile device management (MDM) platforms.

Patch guidance

Apply the Android security update released on or after June 16, 2026, which addresses CVE-2026-0153. For enterprise deployments, verify patch availability through your device manufacturer's security bulletin and test updates in a controlled environment before broad rollout. Given the local privilege escalation nature, patching should be prioritized for devices in sensitive roles (admin workstations, financial systems, IoT gateways). Monitor Google's official Android security advisories for version-specific guidance.

Detection guidance

Monitor system logs for suspicious local code execution attempts and privilege escalation activities. Look for anomalous process creation with unexpected privilege levels, especially if originating from untrusted applications. Deploy endpoint detection and response (EDR) solutions or mobile threat defense platforms configured to flag unusual local privilege escalation patterns. Check for unexpected SELinux denials or capability usage that indicates exploitation attempts. Audit application installation logs to identify potentially compromised or malicious apps that could serve as exploitation vectors.

Why prioritize this

This vulnerability merits high priority remediation due to its HIGH CVSS score (7.8), lack of user interaction required, and straightforward local privilege escalation path. The combination of complete impact on confidentiality, integrity, and availability—coupled with the low barrier to exploitation for any local code running on the device—makes it attractive to sophisticated attackers seeking to gain elevated device control. Organizations with Android deployments in security-sensitive contexts should prioritize patching.

Risk score, explained

The CVSS 3.1 score of 7.8 reflects: (1) Local attack vector requiring existing code execution capability; (2) Low complexity, meaning no special preconditions; (3) Low privileges required (unprivileged user can exploit); (4) No user interaction needed; (5) Unrestricted impact on confidentiality (H), integrity (H), and availability (H). The score is not maximum because the attack vector is local rather than network-adjacent. However, the complete impact on all three CIA pillars and the low barrier to exploitation elevate this to HIGH severity.

Frequently asked questions