Description
In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7996: validate default EEPROM firmware size

The default EEPROM firmware is parsed and copied as a full EEPROM
without checking its length. A truncated file can make the driver
read beyond the firmware buffer during variant validation or the
fallback copy.

Reject files shorter than MT7996_EEPROM_SIZE before parsing or
copying the firmware.
Published: 2026-09-11
Score: 5.7 Medium
EPSS: n/a
KEV: No
Impact: Denial of Service via kernel crash caused by an out‑of‑bounds read
Action: Apply Patch
AI Analysis

Impact

The Linux kernel wifi driver mt76/mt7996 parses the default EEPROM firmware without verifying its size. If the firmware file is truncated, the driver copies the firmware into a buffer and then later reads beyond the buffer during variant validation or fallback copying. This out‑of‑bounds read (CWE‑125) can trigger a kernel fault, leading to a crash and loss of availability. No direct code execution or information disclosure is explicitly stated, but the fault may reveal kernel internals depending on crash context.

Affected Systems

The vulnerability affects the Linux kernel, specifically the wifi drivers for MediaTek MT76 and MT7996 devices. No version range is specified in the CNA data; therefore any system running a kernel that includes the mt76/mt7996 driver may be impacted.

Risk and Exploitability

The CVSS score of 5.7 indicates a moderate severity. The EPSS score is not available, and the vulnerability is not listed in the CISA KEV catalog. The likely attack vector is local or requires the ability to supply or modify the EEPROM firmware used by the driver, which typically occurs during device boot or firmware update. An attacker who can influence the firmware source could trigger the out‑of‑bounds read, causing a kernel‑level denial of service. Due to the absence of a publicly available exploit and moderate CVSS, the risk is considered moderate but should be mitigated promptly to prevent potential disruptions.

Generated by OpenCVE AI on September 12, 2026 at 01:46 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the Linux kernel to a version that includes the fix which validates the EEPROM firmware size before parsing.
  • If a kernel update is unavailable, disable or remove the mt76 driver or prevent it from loading the default EEPROM firmware for MT7996 devices.
  • As a temporary measure, verify that any default EEPROM firmware files used by the system are at least MT7996_EEPROM_SIZE bytes long before the driver processes them.

Generated by OpenCVE AI on September 12, 2026 at 01:46 UTC.

Tracking

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Advisories

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History

Sat, 12 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.7, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H'}

threat_severity

Moderate


Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: validate default EEPROM firmware size The default EEPROM firmware is parsed and copied as a full EEPROM without checking its length. A truncated file can make the driver read beyond the firmware buffer during variant validation or the fallback copy. Reject files shorter than MT7996_EEPROM_SIZE before parsing or copying the firmware.
Title wifi: mt76: mt7996: validate default EEPROM firmware size
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-11T19:42:07.754Z

Reserved: 2026-08-26T14:34:25.802Z

Link: CVE-2026-80933

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-11T20:18:57.160

Modified: 2026-09-11T20:18:57.160

Link: CVE-2026-80933

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-11T19:42:07Z

Links: CVE-2026-80933 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-12T02:00:07Z

Weaknesses