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MediaTek Audio HAL CVE-2026-20507

| EUVDEUVD-2026-72200 MEDIUM
Use After Free (CWE-416)
2026-09-07 MediaTek GHSA-jp9f-f36c-fh7v
6.7
CVSS 3.1 · Vendor: MediaTek
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Severity by source

Vendor (MediaTek) PRIMARY
6.7 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
6.7 MEDIUM

Local access and pre-existing System privilege (PR:H) required; no scope change; full C/I/A impact achievable via UAF-to-code-execution on success.

3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (MediaTek).

CVSS VectorVendor: MediaTek

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Sep 07, 2026 - 11:29 vuln.today
CVE Published
Sep 07, 2026 - 01:57 cve.org
MEDIUM 6.7
CVE Published
Sep 07, 2026 - 01:57 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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-9125.

AnalysisAI

Local privilege escalation in the MediaTek Audio Hardware Abstraction Layer (HAL) allows an attacker who has already obtained System-level privilege to further escalate to higher privileges via a use-after-free condition (CWE-416). The vulnerability affects over 65 MediaTek chipset models spanning Android smartphones, tablets, IoT, and connected-device SoCs. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to already possess System-level privilege on the target MediaTek device - this is a non-trivial prerequisite in the Android security model, typically requiring a prior exploit chain. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 3.1 score of 6.7 with vector AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H accurately captures the constrained exploitability: the attacker must already hold System-level privilege on the target device, limiting the initial entry bar significantly. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the MediaTek-provided patch ALPS11191981 as distributed through the September 2026 MediaTek Product Security Bulletin (https://www.mediatek.com/product-security-bulletin/September-2026). … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-20507 vulnerability details – vuln.today

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