SB20260626109 - Out-of-bounds read in Linux kernel linux mlx5

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Main Vulnerability Database SB20260626109

SB20260626109 - Out-of-bounds read in Linux kernel linux mlx5

Published: June 26, 2026

Security Bulletin ID SB20260626109
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) Out-of-bounds read (CVE-ID: CVE-2026-53230)

CWE-ID: CWE-125 - Out-of-bounds read

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 an out-of-bounds read in mlx5_query_nic_vport_mac_list when querying a VF vport MAC list with a larger configured maximum than the PF capability-based buffer size. A local user can configure or trigger processing of a VF vport with a larger MAC list to cause a denial of service.

The issue occurs in the mlx5 driver while handling vport address list updates.


Remediation

Install update from vendor's website.

References