CVE-2026-20501
Summary
| CVE | CVE-2026-20501 |
|---|---|
| State | PUBLISHED |
| Assigner | MediaTek |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-07 02:17:18 UTC |
| Updated | 2026-09-09 02:55:16 UTC |
| Description | In vdec, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11262030; Issue ID: MSV-9197. |
Risk And Classification
Primary CVSS: v3.1 8.4 HIGH from ADP
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001500000 probability, percentile 0.044790000 (date 2026-09-07)
Problem Types: CWE-122 | CWE-122 CWE-122 Heap-based Buffer Overflow
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | DECLARED | 8.4 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 8.4 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Hardware | Mediatek | Mt2718 | - | All | All | All |
| Operating System | Mediatek | Mt2718 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6580 | - | All | All | All |
| Operating System | Mediatek | Mt6580 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6739 | - | All | All | All |
| Operating System | Mediatek | Mt6739 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6761 | - | All | All | All |
| Operating System | Mediatek | Mt6761 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6765 | - | All | All | All |
| Operating System | Mediatek | Mt6765 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6768 | - | All | All | All |
| Operating System | Mediatek | Mt6768 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6769 | - | All | All | All |
| Operating System | Mediatek | Mt6769 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6779 | - | All | All | All |
| Operating System | Mediatek | Mt6779 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6781 | - | All | All | All |
| Operating System | Mediatek | Mt6781 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6785 | - | All | All | All |
| Operating System | Mediatek | Mt6785 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6789 | - | All | All | All |
| Operating System | Mediatek | Mt6789 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6833 | - | All | All | All |
| Operating System | Mediatek | Mt6833 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6835 | - | All | All | All |
| Operating System | Mediatek | Mt6835 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6853 | - | All | All | All |
| Operating System | Mediatek | Mt6853 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6855 | - | All | All | All |
| Operating System | Mediatek | Mt6855 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6858 | - | All | All | All |
| Operating System | Mediatek | Mt6858 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6873 | - | All | All | All |
| Operating System | Mediatek | Mt6873 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6877 | - | All | All | All |
| Operating System | Mediatek | Mt6877 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6878 | - | All | All | All |
| Operating System | Mediatek | Mt6878 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6879 | - | All | All | All |
| Operating System | Mediatek | Mt6879 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6881 | - | All | All | All |
| Operating System | Mediatek | Mt6881 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6883 | - | All | All | All |
| Operating System | Mediatek | Mt6883 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6885 | - | All | All | All |
| Operating System | Mediatek | Mt6885 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6886 | - | All | All | All |
| Operating System | Mediatek | Mt6886 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6889 | - | All | All | All |
| Operating System | Mediatek | Mt6889 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6893 | - | All | All | All |
| Operating System | Mediatek | Mt6893 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6895 | - | All | All | All |
| Operating System | Mediatek | Mt6895 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6897 | - | All | All | All |
| Operating System | Mediatek | Mt6897 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6899 | - | All | All | All |
| Operating System | Mediatek | Mt6899 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6983 | - | All | All | All |
| Operating System | Mediatek | Mt6983 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6985 | - | All | All | All |
| Operating System | Mediatek | Mt6985 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6989 | - | All | All | All |
| Operating System | Mediatek | Mt6989 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6991 | - | All | All | All |
| Operating System | Mediatek | Mt6991 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6993 | - | All | All | All |
| Operating System | Mediatek | Mt6993 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8126 | - | All | All | All |
| Operating System | Mediatek | Mt8126 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8171 | - | All | All | All |
| Operating System | Mediatek | Mt8171 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8186 | - | All | All | All |
| Operating System | Mediatek | Mt8186 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8188 | - | All | All | All |
| Operating System | Mediatek | Mt8188 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8189 | - | All | All | All |
| Operating System | Mediatek | Mt8189 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8195 | - | All | All | All |
| Operating System | Mediatek | Mt8195 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8196 | - | All | All | All |
| Operating System | Mediatek | Mt8196 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8367 | - | All | All | All |
| Operating System | Mediatek | Mt8367 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8391 | - | All | All | All |
| Operating System | Mediatek | Mt8391 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8395 | - | All | All | All |
| Operating System | Mediatek | Mt8395 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8668 | - | All | All | All |
| Operating System | Mediatek | Mt8668 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8676 | - | All | All | All |
| Operating System | Mediatek | Mt8676 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8678 | - | All | All | All |
| Operating System | Mediatek | Mt8678 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8696 | - | All | All | All |
| Operating System | Mediatek | Mt8696 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8781 | - | All | All | All |
| Operating System | Mediatek | Mt8781 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8788e | - | All | All | All |
| Operating System | Mediatek | Mt8788e Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8792 | - | All | All | All |
| Operating System | Mediatek | Mt8792 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8799 | - | All | All | All |
| Operating System | Mediatek | Mt8799 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt8910 | - | All | All | All |
| Operating System | Mediatek | Mt8910 Firmware | - | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT2718 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6580 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6739 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6761 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6765 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6768 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6769 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6779 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6781 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6785 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6789 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6833 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6835 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6853 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6855 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6858 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6873 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6877 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6878 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6879 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6881 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6883 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6885 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6886 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6889 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6893 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6895 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6897 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6899 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6983 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6985 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6989 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6991 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6993 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8126 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8171 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8186 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8188 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8189 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8195 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8196 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8367 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8391 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8395 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8668 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8676 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8678 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8696 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8781 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8788E | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8792 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8799 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT8910 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.mediatek.com/product-security-bulletin/September-2026 | [email protected] | www.mediatek.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.