Local privilege escalation via timed-out BigWave job
Published Dec 11, 2025 · Updated Dec 11, 2025
Use-after-free in Google Android's BigWave kernel driver allows local users to escalate privileges through /dev/bigwave. BIGO_IOCX_PROCESS times out while bigo_worker_thread still owns the job, so closing the file descriptor frees its objects before the worker copies registers through job->regs. Access to /dev/bigwave is required; reclaiming the freed allocation converts the stale pointer into a 2,144-byte kernel write that enables root credentials without user interaction.
Summary
What happened
Use-after-free in Google Android's BigWave kernel driver allows local users to escalate privileges through /dev/bigwave. BIGO_IOCX_PROCESS times out while bigo_worker_thread still owns the job, so closing the file descriptor frees its objects before the worker copies registers through job->regs. Access to /dev/bigwave is required; reclaiming the freed allocation converts the stale pointer into a 2,144-byte kernel write that enables root credentials without user interaction.
The record
- CVE
- CVE-2025-36934
- Published
- Dec 11, 2025
- Updated
- Dec 11, 2025
- Vendor
- Go standard library
- Product
- Android
- Classifications
- CWE-416, CWE-362, T1068
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 11, 2025CVE publishedPublication date reported by the CVE source.
- Dec 11, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Android kernel
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Pixel 9 BigWave kernel exploitfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo