SB2026082446 - Race condition in Linux kernel net bonding driver

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Main Vulnerability Database SB2026082446

SB2026082446 - Race condition in Linux kernel net bonding driver

Published: August 24, 2026

Security Bulletin ID SB2026082446
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-2026-74726)

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 user to cause a denial of service.

The vulnerability exists due to a race condition in bond_alb_monitor in the bonding ALB implementation when handling active slave changes under RTNL. A local user can trigger network interface state changes to cause a denial of service.

The issue can lead to a null pointer dereference and kernel panic, and in failover cases can underflow the new slave's promiscuity counter and leave it stuck in promiscuous mode.


Remediation

Install update from vendor's website.

References