CVE-2026-20473

Display Memory Corruption in MediaTek Chipsets Leading to Local Privilege Escalation

Published Aug 3, 2026 CVSS 3.1 · 6 Medium EPSS < 1% KEV · Not listed
Description
In display, there is a possible memory corruption 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: ALPS11019722; Issue ID: MSV-7759.

Analysis

AI-generated

Technical impact

The vulnerability is a use‑after‑free flaw that can corrupt memory during display handling. If an attacker already holds system privileges on the device and exploits this flaw, they can elevate their privileges locally. User interaction is not required, making the exploit possible in unattended situations.

Affected Systems

The affected products are MediaTek chipsets supplied by MediaTek, Inc. No specific firmware or hardware version is listed in the data.

Risk and Exploitability

The EPSS score is <1% and the vulnerability is not listed in the CISA KEV catalog, suggesting limited public exploitation. The CVSS score is 6, indicating a moderate severity. However, because the flaw requires an attacker to already have system privileges, the risk is confined to environments where such privilege is obtainable, such as compromised devices or during firmware update processes. The severity, based on the use‑after‑free weakness, remains high for privileged attackers, so prioritizing remediation is advisable.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the vendor‑issued firmware patch identified by ALPS11019722
  • If a patch is not yet available, temporarily disable or isolate the affected display functionality to prevent exploitation
  • Monitor system logs for anomalous memory access or display errors that may signal an attempt to exploit the use‑after‑free flaw

Generated by OpenCVE AI on August 4, 2026 at 10:52 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Mediatek
Mediatek mt6991
Mediatek mt6991 Firmware
Mediatek mt6993
Mediatek mt6993 Firmware
Mediatek mt8126
Mediatek mt8126 Firmware
Mediatek mt8171
Mediatek mt8171 Firmware
Mediatek mt8188
Mediatek mt8188 Firmware
Mediatek mt8189
Mediatek mt8189 Firmware
Mediatek mt8367
Mediatek mt8367 Firmware
Mediatek mt8668
Mediatek mt8668 Firmware
Mediatek mt8676
Mediatek mt8676 Firmware
Mediatek mt8678
Mediatek mt8678 Firmware
Mediatek mt8766
Mediatek mt8766 Firmware
Mediatek mt8768
Mediatek mt8768 Firmware
Mediatek mt8781
Mediatek mt8781 Firmware
Mediatek mt8786
Mediatek mt8786 Firmware
Mediatek mt8791t
Mediatek mt8791t Firmware
Mediatek mt8799
Mediatek mt8799 Firmware
Mediatek mt8910
Mediatek mt8910 Firmware
CPEs cpe:2.3:h:mediatek:mt6991:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6993:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8126:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8171:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8188:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8189:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8367:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8668:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8676:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8678:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8766:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8768:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8781:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8786:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8791t:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8799:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8910:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6991_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6993_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8126_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8171_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8188_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8189_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8367_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8668_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8676_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8678_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8766_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8768_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8781_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8786_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8791t_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8799_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8910_firmware:-:*:*:*:*:*:*:*
Vendors & Products Mediatek
Mediatek mt6991
Mediatek mt6991 Firmware
Mediatek mt6993
Mediatek mt6993 Firmware
Mediatek mt8126
Mediatek mt8126 Firmware
Mediatek mt8171
Mediatek mt8171 Firmware
Mediatek mt8188
Mediatek mt8188 Firmware
Mediatek mt8189
Mediatek mt8189 Firmware
Mediatek mt8367
Mediatek mt8367 Firmware
Mediatek mt8668
Mediatek mt8668 Firmware
Mediatek mt8676
Mediatek mt8676 Firmware
Mediatek mt8678
Mediatek mt8678 Firmware
Mediatek mt8766
Mediatek mt8766 Firmware
Mediatek mt8768
Mediatek mt8768 Firmware
Mediatek mt8781
Mediatek mt8781 Firmware
Mediatek mt8786
Mediatek mt8786 Firmware
Mediatek mt8791t
Mediatek mt8791t Firmware
Mediatek mt8799
Mediatek mt8799 Firmware
Mediatek mt8910
Mediatek mt8910 Firmware
Type Values Removed Values Added
Title Display Memory Corruption in MediaTek Chipsets Leading to Local Privilege Escalation
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}

ssvc

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

Type Values Removed Values Added
First Time appeared Mediatek, Inc.
Mediatek, Inc. mediatek Chipset
Vendors & Products Mediatek, Inc.
Mediatek, Inc. mediatek Chipset
Type Values Removed Values Added
Description In display, there is a possible memory corruption 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: ALPS11019722; Issue ID: MSV-7759.
Weaknesses CWE-416
References