Description
In wifi, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: BORA00154903; Issue ID: MSV-7575.
Published: 2026-08-03
Score: 4.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability is an out‑of‑bounds write in the MediaTek WiFi driver caused by a missing bounds check, which can lead to local denial of service when an attacker already has system privilege. No user interaction is required for exploitation.

Affected Systems

This issue affects MediaTek chipset products, specifically the WiFi driver on devices powered by MediaTek processors. The precise product list is not detailed in the advisory, but any device using the affected chipset firmware is potentially vulnerable. No specific version numbers are provided, so all current releases carrying the unpatched driver should be considered at risk until a patch is applied.

Risk and Exploitability

The exploit requires that the attacker already possess system privileges; no user interaction is needed and it cannot be triggered remotely. EPSS score is < 1%. The CVSS score is 4.4. The vulnerability is not listed in CISA KEV, indicating no confirmed public exploits yet. While the flaw denies WiFi functionality to the affected device, it does not allow modification of other system resources without additional privileges.

Generated by OpenCVE AI on August 4, 2026 at 10:47 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the device firmware or WiFi driver to a version that includes the BORA00154903 patch from MediaTek
  • Confirm with MediaTek support that the patch applies to all chipset variants in use
  • Perform a staged rollout of the patch to all affected devices before full deployment

Generated by OpenCVE AI on August 4, 2026 at 10:47 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 19 Aug 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Mediatek
Mediatek mt6890
Mediatek mt6890 Firmware
Mediatek mt6988
Mediatek mt6988 Firmware
Mediatek mt6990
Mediatek mt6990 Firmware
CPEs cpe:2.3:h:mediatek:mt6890:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6988:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6990:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6890_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6988_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6990_firmware:-:*:*:*:*:*:*:*
Vendors & Products Mediatek
Mediatek mt6890
Mediatek mt6890 Firmware
Mediatek mt6988
Mediatek mt6988 Firmware
Mediatek mt6990
Mediatek mt6990 Firmware

Tue, 04 Aug 2026 11:15:00 +0000

Type Values Removed Values Added
Title Local Denial of Service via Out-of-Bounds Write in MediaTek WiFi Driver

Mon, 03 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

ssvc

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


Mon, 03 Aug 2026 06:15:00 +0000

Type Values Removed Values Added
First Time appeared Mediatek, Inc.
Mediatek, Inc. mediatek Chipset
Vendors & Products Mediatek, Inc.
Mediatek, Inc. mediatek Chipset

Mon, 03 Aug 2026 02:45:00 +0000

Type Values Removed Values Added
Description In wifi, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: BORA00154903; Issue ID: MSV-7575.
Weaknesses CWE-787
References

Subscriptions

Mediatek Mt6890 Mt6890 Firmware Mt6988 Mt6988 Firmware Mt6990 Mt6990 Firmware
Mediatek, Inc. Mediatek Chipset
cve-icon MITRE

Status: PUBLISHED

Assigner: MediaTek

Published:

Updated: 2026-08-03T19:47:06.327Z

Reserved: 2025-11-03T01:30:59.026Z

Link: CVE-2026-20493

cve-icon Vulnrichment

Updated: 2026-08-03T19:47:00.007Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-03T03:16:44.443

Modified: 2026-08-19T15:08:40.987

Link: CVE-2026-20493

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-04T11:00:07Z

Weaknesses