Local service interruption via missing ccci bounds check
Published Aug 3, 2026 · Updated Aug 3, 2026
Out-of-bounds read in MediaTek ccci on MT6813, MT6986, and MT6988 allows local users to interrupt device service. The ccci component reads beyond a buffer after omitting a bounds check; MediaTek has not disclosed the affected function, buffer, or input path. Exploitation requires user-level execution on a device with an affected chipset, needs no user interaction, and is limited to availability loss.
Summary
What happened
Out-of-bounds read in MediaTek ccci on MT6813, MT6986, and MT6988 allows local users to interrupt device service. The ccci component reads beyond a buffer after omitting a bounds check; MediaTek has not disclosed the affected function, buffer, or input path. Exploitation requires user-level execution on a device with an affected chipset, needs no user interaction, and is limited to availability loss.
The record
- CVE
- CVE-2026-20476
- Published
- Aug 3, 2026
- Updated
- Aug 3, 2026
- Vendor
- MediaTek
- Product
- MediaTek Chipset
- Classifications
- CWE-787, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 3, 2026CVE publishedPublication date reported by the CVE source.
- Aug 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=MT6813
- Affected versionversion=MT6986
- Affected versionversion=MT6988
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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