Physical denial of service via unchecked DA write
Published Aug 3, 2026 · Updated Aug 3, 2026
Out-of-bounds write in MediaTek chipset DA allows physically proximate attackers to interrupt affected devices through physical access. The DA subcomponent writes beyond a buffer because it processes input without the required bounds check; the affected routine and input field are undisclosed. The flaw requires no privileges or user interaction and affects MT2735, MT2737, MT6813, MT6880, MT6890, MT6986, MT6988, and MT6990 chipsets.
Summary
What happened
Out-of-bounds write in MediaTek chipset DA allows physically proximate attackers to interrupt affected devices through physical access. The DA subcomponent writes beyond a buffer because it processes input without the required bounds check; the affected routine and input field are undisclosed. The flaw requires no privileges or user interaction and affects MT2735, MT2737, MT6813, MT6880, MT6890, MT6986, MT6988, and MT6990 chipsets.
The record
- CVE
- CVE-2026-20471
- Published
- Aug 3, 2026
- Updated
- Aug 3, 2026
- Vendor
- MediaTek
- Product
- MediaTek Chipset
- Classifications
- CWE-787, T1499.004
- Attack vector
- physical
- Privileges
- unauthenticated
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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=MT2735
- Affected versionversion=MT2737
- Affected versionversion=MT6813
- Affected versionversion=MT6880
- Affected versionversion=MT6890
- Affected versionversion=MT6986
- Affected versionversion=MT6988
- Affected versionversion=MT6990
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
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Weakness, pattern, technique
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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