SB2026080767 - Race condition in Linux kernel ethernet arc driver

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Main Vulnerability Database SB2026080767

SB2026080767 - Race condition in Linux kernel ethernet arc driver

Published: August 7, 2026

Security Bulletin ID SB2026080767
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) Race condition (CVE-ID: CVE-2026-64587)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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 attacker to cause a denial of service.

The vulnerability exists due to a race condition in arc_emac_intr() and the arc emac driver probe path when handling a stale or latched interrupt during probe teardown after requesting the IRQ. A local attacker can trigger delivery of a stale interrupt to race with release of the associated net_device to cause a denial of service.

The issue arises from leftover interrupt state that may be presented by firmware or the bootloader.


Remediation

Install update from vendor's website.

References