CVE-2026-20506 (GCVE-0-2026-20506)
Vulnerability from cvelistv5 – Published: 2026-09-07 01:57 – Updated: 2026-09-08 03:55
VLAI
EPSS
VEX
Summary
In Audio HAL, there is a possible escalation of privilege due to use after free. 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: ALPS11191981; Issue ID: MSV-9126.
Severity
6.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-07 00:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| MediaTek, Inc. | MediaTek chipset |
Affected:
MT2718
Affected: MT6739 Affected: MT6761 Affected: MT6765 Affected: MT6768 Affected: MT6769 Affected: MT6781 Affected: MT6789 Affected: MT6833 Affected: MT6835 Affected: MT6853 Affected: MT6855 Affected: MT6858 Affected: MT6877 Affected: MT6878 Affected: MT6879 Affected: MT6881 Affected: MT6883 Affected: MT6885 Affected: MT6886 Affected: MT6889 Affected: MT6893 Affected: MT6895 Affected: MT6897 Affected: MT6899 Affected: MT6983 Affected: MT6985 Affected: MT6989 Affected: MT6991 Affected: MT6993 Affected: MT8126 Affected: MT8168 Affected: MT8171 Affected: MT8186 Affected: MT8188 Affected: MT8189 Affected: MT8196 Affected: MT8321 Affected: MT8365 Affected: MT8367 Affected: MT8385 Affected: MT8390 Affected: MT8391 Affected: MT8668 Affected: MT8676 Affected: MT8678 Affected: MT8696 Affected: MT8755 Affected: MT8766 Affected: MT8766R Affected: MT8768 Affected: MT8771 Affected: MT8775 Affected: MT8781 Affected: MT8786 Affected: MT8788E Affected: MT8791T Affected: MT8792 Affected: MT8796 Affected: MT8797 Affected: MT8798 Affected: MT8799 Affected: MT8873 Affected: MT8883 Affected: MT8893 Affected: MT8910 |
guessed |
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"providerMetadata": {
"dateUpdated": "2026-09-07T01:57:21.518Z",
"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374",
"shortName": "MediaTek"
},
"references": [
{
"url": "https://www.mediatek.com/product-security-bulletin/September-2026"
}
],
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374",
"assignerShortName": "MediaTek",
"cveId": "CVE-2026-20506",
"datePublished": "2026-09-07T01:57:21.518Z",
"dateReserved": "2025-11-03T01:30:59.029Z",
"dateUpdated": "2026-09-08T03:55:25.554Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.