CVE-2026-0131: Android RTP Integer Overflow Privilege Escalation Vulnerability

Technical summary

CVE-2026-0131 is an out-of-bounds memory access vulnerability in the RtpPacket::decodePacket function within Android's media stack. The root cause is an integer overflow that fails to properly validate packet length calculations before allocating or accessing memory buffers. This allows an attacker to read or write memory beyond the intended bounds of the RTP packet structure. The vulnerability is classified under CWE-125 (Out-of-bounds Read) and CWE-190 (Integer Overflow or Wraparound), indicating both the immediate symptom and the underlying integer arithmetic flaw. The attack surface requires local code execution context and user interaction to trigger, reducing but not eliminating the practical risk.

Business impact

This vulnerability enables privilege escalation on Android devices from a local, lower-privileged process to higher system privileges. A compromised or malicious application could exploit this to gain unauthorized access to sensitive data, modify system settings, or persist across reboots. For organizations deploying Android devices in enterprise environments, successful exploitation could lead to device compromise, data exfiltration, or lateral movement within corporate networks. The requirement for user interaction (such as opening a media file) makes social engineering a viable attack vector.

Affected systems

Google Android is the confirmed affected platform. The vulnerability resides in core media processing libraries used across all Android versions and device manufacturers. Device-specific impact depends on Android patch level; devices that have not received the security update remain vulnerable. OEM customizations of the media stack may introduce additional variants of this code path.

Exploitability

Exploitation requires local access and a user interaction trigger, which moderates the risk compared to remote unauthenticated attacks. An attacker must already have code execution in a lower-privileged context and then convince or trick a user into opening a malicious RTP stream. The simplicity of the integer overflow condition (no exotic mitigations required) and the ubiquity of media handling suggest that proof-of-concept development is relatively straightforward once the exact overflow condition is documented. The vulnerability is not currently tracked in CISA's Known Exploited Vulnerabilities catalog, but this does not guarantee active exploitation is absent.

Remediation

Apply the latest Android security patch released after June 16, 2026. Verify the patch version in your device settings under About Phone > Build Number and confirm it includes the June 2026 security patch or later. For enterprise deployments, prioritize patching devices in roles requiring high assurance or that handle untrusted media files. Restrict installation of applications from untrusted sources, as a compromised app could trigger the vulnerability.

Patch guidance

Consult Google's official Android Security & Privacy Year in Review or your device manufacturer's security bulletin for the exact patch version addressing CVE-2026-0131. Patches are typically released via over-the-air (OTA) updates; enable automatic updates in Settings > System > System Update to receive fixes promptly. Users on unsupported Android versions should consider device upgrade timelines. For locked enterprise devices, coordinate with your MDM solution to enforce the latest patch level across your fleet.

Detection guidance

Monitor for unexpected privilege escalation events on Android devices, particularly when preceded by media file handling or unusual RTP stream activity. Application-level anomalies such as a low-privilege app suddenly gaining access to sensitive system services or user data should trigger investigation. Review logcat and system logs for RtpPacket decoding errors or memory access violations. Behavioral indicators include unusual network traffic patterns mimicking RTP streams targeting local processes, or application crashes followed by privilege elevation.

Why prioritize this

A CVSS 3.1 score of 7.3 (HIGH) reflects the local escalation-of-privilege impact combined with high confidentiality, integrity, and availability consequences. The integer overflow is a well-understood and fixable bug class, reducing the likelihood of widespread false positives. However, the reliance on user interaction is a mitigating factor that prevents a CRITICAL rating. Prioritize patching based on device role: prioritize devices with access to enterprise data or those used in high-security operations, then expand to general fleet coverage.

Risk score, explained

The score of 7.3 balances the severity of privilege escalation (HIGH impact on C, I, A) against attack constraints (local access, user interaction required). The attack vector is local (AV:L), attack complexity is low (AC:L), privileges required are low (PR:L), and the exploit requires user interaction (UI:R). Scope is unchanged (S:U), meaning the attacker gains privileges only in the context of the vulnerable application, not across all system services—though this is still substantial. Organizations should treat this as a high-priority patch despite the user interaction requirement, as media handling is commonplace.

Frequently asked questions