SB20260919182 - Use-after-free in Linux kernel mt76 mt7915 driver

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Main Vulnerability Database SB20260919182

SB20260919182 - Use-after-free in Linux kernel mt76 mt7915 driver

Published: September 19, 2026

Security Bulletin ID SB20260919182
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-90353)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to compromise system confidentiality, integrity, and availability.

The vulnerability exists due to use-after-free in the mt7915 wireless driver's registration error path when main PHY debugfs initialization or coredump registration fails after successful external PHY registration. A local user can exploit the external PHY hardware object being freed while still registered with mac80211 to compromise system confidentiality, integrity, and availability.

The error cleanup calls mt76_unregister_device(), which unregisters only the main hardware object.


Remediation

Install update from vendor's website.

References