Description
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.
Published: 2026-09-07
Score: 6.7 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Escalation of Privilege
Action: Immediate Patch
AI Analysis

Impact

The vulnerability resides in MediaTek's Audio HAL where a use‑after‑free condition allows a process that already has System level privileges to manipulate dangling pointers, potentially rising its own privilege level. The flaw does not grant arbitrary code execution on its own; it is limited to local privilege escalation for an attacker who already has substantial device access. The impact is confined to the device’s integrity and the potential to bypass the current privilege boundaries within the local context.

Affected Systems

Affected vendors: MediaTek, Inc. Product: MediaTek chipset. No specific firmware or software version was supplied in the advisory. Consequently, all MediaTek chipsets that include the legacy Audio HAL implementation remain potentially vulnerable until a patch is applied.

Risk and Exploitability

The CVSS score of 6.7 indicates a medium severity local issue, but the use‑after‑free flaw combined with the lack of user interaction requirement and the prerequisite of System privileges make it a significant risk. The EPSS score is not available and the vulnerability is not listed in the CISA KEV catalog. Once an attacker has System rights, exploitation is relatively straightforward, emphasizing the importance of applying the vendor‑issued fix as soon as possible.

Generated by OpenCVE AI on September 7, 2026 at 14:03 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the official patch ALPS11191981 provided by MediaTek to address the use‑after‑free flaw.
  • Restrict the processes that can access the Audio HAL to only those that need privileged rights to mitigate potential exploitation.
  • Use memory protection techniques such as bounds checking or static analysis tools to detect and prevent use‑after‑free conditions in custom development.

Generated by OpenCVE AI on September 7, 2026 at 14:03 UTC.

Tracking

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Advisories

No advisories yet.

History

Mon, 07 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Title Use‑After‑Free in MediaTek Audio HAL Enables Local Privilege Escalation

Mon, 07 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 07 Sep 2026 04:15:00 +0000

Type Values Removed Values Added
Title Use‑After‑Free in MediaTek Audio HAL Enables Local Privilege Escalation
First Time appeared Mediatek, Inc.
Mediatek, Inc. mediatek Chipset
Vendors & Products Mediatek, Inc.
Mediatek, Inc. mediatek Chipset

Mon, 07 Sep 2026 02:00:00 +0000

Type Values Removed Values Added
Description 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.
Weaknesses CWE-416
References

Subscriptions

Mediatek, Inc. Mediatek Chipset
cve-icon MITRE

Status: PUBLISHED

Assigner: MediaTek

Published:

Updated: 2026-09-08T03:55:25.554Z

Reserved: 2025-11-03T01:30:59.029Z

Link: CVE-2026-20506

cve-icon Vulnrichment

Updated: 2026-09-07T10:35:11.577Z

cve-icon NVD

Status : Deferred

Published: 2026-09-07T02:17:19.250

Modified: 2026-09-08T18:37:41.047

Link: CVE-2026-20506

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-07T14:15:16Z

Weaknesses