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The vulnerability CVE-2025-48583 resides in multiple functions within the `BaseBundle.java` class of the Android framework. A logic error in the code’s internal data handling and validation logic creates an exploitable condition. This flaw can be triggered during the deserialization or processing of maliciously crafted Bundle data by a vulnerable application or system component. The core issue involves an inconsistency in how the framework verifies and restricts data types and object boundaries within the Bundle’s key-value pairs. An attacker can construct a specialized Bundle object containing manipulated elements that bypass the intended security checks.
When this malicious Bundle is processed by the affected functions, the logic error causes the system to misinterpret the data structure. This misinterpretation can lead to type confusion or boundary violations in memory. Exploiting this condition allows an attacker to influence the control flow of the executing process. Ultimately, it enables the execution of arbitrary code within the context of the privileged process handling the Bundle. Successful exploitation leads to a local escalation of privilege from a lower-integrity process to a higher one. The attack requires no user interaction and no additional execution privileges, as it exploits a flaw in a core system component. It represents a classic case of a confused deputy problem within the Android Parcel and Bundle serialization mechanism.
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Platform: Android
Version: Multiple versions
Vulnerability : Logic error escalation
Severity: Critical
date: 2025-12-08
Prediction: 2026-01-08
What Undercode Say:
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`adb shell dumpsys package | grep -A5 -B5 “baseBundle”`
`frida-trace -U -j “BaseBundle” com.target.app`
`apktool d vulnerable_app.apk && grep -r “BaseBundle” vulnerable_app/smali/`
`logcat -s AndroidRuntime:E | grep -i “bundle\|parcel”`
How Exploit:
Craft malicious application or service that creates a Bundle with invalid or nested object types. Use Binder transaction to send the malicious Bundle to a vulnerable, high-privilege system service. Trigger the logic error in BaseBundle’s getString(), putByteArray(), or similar method to corrupt memory. Chain the memory corruption to gain arbitrary code execution in the system_server context.
Protection from this CVE
Apply Android security updates from December 2025 or later. For OEMs: merge AOSP patches for commit a8d7c2f1 (example). Developers: validate all Bundle data from untrusted sources. Use `Bundle.get()` with explicit type checking. Disable unnecessary app permissions.
Impact
Local privilege escalation. Arbitrary code execution as system. Complete device compromise. Bypass of sandbox isolation.
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Sources:
Reported By: nvd.nist.gov
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