SB20260812108 - Improper access control in Linux kernel hw irdma driver

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Main Vulnerability Database SB20260812108

SB20260812108 - Improper access control in Linux kernel hw irdma driver

Published: August 12, 2026

Security Bulletin ID SB20260812108
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 access control (CVE-ID: CVE-2026-68419)

CWE-ID: CWE-284 - Improper Access Control

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 access control in irdma_rereg_user_mr when re-registering non-memory regions. A local user can invoke rereg_mr on a specially registered QP, CQ, or SRQ region to cause a denial of service.

The issue affects special RDMA registrations created through a two-step userspace allocation and registration process where the region does not have a valid mkey.


Remediation

Install update from vendor's website.

References