SB20260828135 - Always-Incorrect Control Flow Implementation in Linux kernel hw hns driver

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Main Vulnerability Database SB20260828135

SB20260828135 - Always-Incorrect Control Flow Implementation in Linux kernel hw hns driver

Published: August 28, 2026

Security Bulletin ID SB20260828135
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-80647)

CWE-ID: CWE-670 - Always-Incorrect Control Flow Implementation

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


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

The vulnerability exists due to improper handling of completion callbacks in the hns roce completion queue handling logic when processing direct mode completion queues during driver reset. A local user can trigger a driver reset with a direct mode cq present to cause a denial of service.

The issue is triggered specifically when a completion queue is allocated in direct polling mode and the device reset path invokes the completion handler unexpectedly.


Remediation

Install update from vendor's website.

References