Local privilege escalation via unchecked RIL buffer write
Published Mar 7, 2023 · Updated Mar 6, 2025
Out-of-bounds write in MediaTek RIL on Android 12.0 and 13.0 allows local users with System privileges to escalate privileges. The RIL component writes beyond a buffer because a required bounds check is missing, although MediaTek has not disclosed the exact function or input field. Exploitation requires existing System execution privileges and no user interaction; the resulting privilege level is not disclosed.
Summary
What happened
Out-of-bounds write in MediaTek RIL on Android 12.0 and 13.0 allows local users with System privileges to escalate privileges. The RIL component writes beyond a buffer because a required bounds check is missing, although MediaTek has not disclosed the exact function or input field. Exploitation requires existing System execution privileges and no user interaction; the resulting privilege level is not disclosed.
The record
- CVE
- CVE-2023-20638
- Published
- Mar 7, 2023
- Updated
- Mar 6, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-20, T1404
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Mar 7, 2023CVE publishedPublication date reported by the CVE source.
- Mar 6, 2025Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Published CVSS scores
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Attacks
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Public exploit references
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Technologies
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