SB2026050799 - Out-of-bounds read in Linux kernel hw mscc driver

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Main Vulnerability Database SB2026050799

SB2026050799 - Out-of-bounds read in Linux kernel hw mscc driver

Published: May 7, 2026

Security Bulletin ID SB2026050799
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-2026-43241)

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 the ntb_hw_switchtec driver when handling NTB configurations with an invalid memory window index. A local user can trigger access to an invalid mw_sizes array index to cause a denial of service.

The issue occurs because the number of memory window lookup table entries depends on the NTB configuration and may be set to MAX_MWS.


Remediation

Install update from vendor's website.

References