SB2026082887 - Type Confusion in Linux kernel ethernet mediatek driver
Published: August 28, 2026
Security Bulletin ID
SB2026082887
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Type Confusion (CVE-ID: CVE-2026-80694)
CWE-ID: CWE-843 - Type confusion
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper type handling in mtk_poll_controller and mtk_handle_irq_rx when handling ndo_poll_controller calls with CONFIG_NET_POLL_CONTROLLER enabled. A local user can trigger ndo_poll_controller to cause a denial of service.
The issue results from passing a net_device pointer where a struct mtk_eth pointer is expected.
Remediation
Install update from vendor's website.