Local privilege escalation via incorrect bounds check
Published Nov 4, 2025 · Updated Nov 4, 2025
Stack-based buffer overflow in MediaTek GNSS Service allows local users with System privilege to escalate privileges without interaction. The GNSS service applies an incorrect bounds check and writes beyond a stack buffer, but MediaTek has not disclosed the specific input path or function. Exploitation requires existing System privilege and local execution; success grants higher local privileges and can compromise data and service operation.
Summary
What happened
Stack-based buffer overflow in MediaTek GNSS Service allows local users with System privilege to escalate privileges without interaction. The GNSS service applies an incorrect bounds check and writes beyond a stack buffer, but MediaTek has not disclosed the specific input path or function. Exploitation requires existing System privilege and local execution; success grants higher local privileges and can compromise data and service operation.
The record
- CVE
- CVE-2025-20746
- Published
- Nov 4, 2025
- Updated
- Nov 4, 2025
- Vendor
- MediaTek
- Product
- MediaTek GNSS Service
- Classifications
- CWE-121, CWE-787, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Nov 4, 2025CVE publishedPublication date reported by the CVE source.
- Nov 4, 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 14.0, 15.0 / openWRT 21.02, 23.05 / Yocto 4.0 / RDK-B 24Q1 / Zephyr 3.7.0
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
No public exploit references are available in this record.
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