SB2026052840 - Improper locking in Linux kernel ethernet micrel driver

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Main Vulnerability Database SB2026052840

SB2026052840 - Improper locking in Linux kernel ethernet micrel driver

Published: May 28, 2026

Security Bulletin ID SB2026052840
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper locking (CVE-ID: CVE-2026-46031)

CWE-ID: CWE-667 - Improper Locking

CVSSv4: 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/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper lock handling in ks8851_irq() when processing interrupts while transmit softirq processing is triggered during critical sections. A local user can trigger network activity that causes the driver to re-enter the transmit path and deadlock the kernel.

The issue occurs in the ks8851 driver and results in a deadlock involving ks8851_start_xmit_par() while the driver lock is already held.


Remediation

Install update from vendor's website.

References