MediaTek MT8793 Display integer overflow

Summaryinfo

A vulnerability was found in MediaTek MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6858, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8171, MT8188, MT8668, MT8676, MT8678 and MT8793. It has been declared as very critical. The affected element is an unknown function of the component Display. The manipulation results in integer overflow. This vulnerability is identified as CVE-2026-20533. The attack is only possible with local access. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as very critical has been found in MediaTek MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6858, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8171, MT8188, MT8668, MT8676, MT8678 and MT8793. Affected is some unknown processing of the component Display. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In display, there is a possible escalation of privilege due to an integer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11296678; Issue ID: MSV-9167.

The advisory is shared for download at mediatek.com. This vulnerability is traded as CVE-2026-20533 since 11/03/2025. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation needs additional levels of successful authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/05/2026).

Applying the patch ALPS11296678 is able to eliminate this problem.

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Productinfo

Type

• Chip Software

Vendor

• MediaTek

Name

• MT6739
• MT6761
• MT6765
• MT6768
• MT6781
• MT6789
• MT6833
• MT6835
• MT6853
• MT6855
• MT6858
• MT6877
• MT6878
• MT6879
• MT6883
• MT6885
• MT6886
• MT6889
• MT6893
• MT6895
• MT6897
• MT6899
• MT6983
• MT6985
• MT6989
• MT6991
• MT6993
• MT8171
• MT8188
• MT8668
• MT8676
• MT8678
• MT8793

License

• commercial

CPE 2.3info

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CPE 2.2info

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