SB2026040699 - NULL pointer dereference in Linux kernel marvell mvpp2 driver

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Main Vulnerability Database SB2026040699

SB2026040699 - NULL pointer dereference in Linux kernel marvell mvpp2 driver

Published: April 6, 2026

Security Bulletin ID SB2026040699
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) NULL pointer dereference (CVE-ID: CVE-2026-23438)

CWE-ID: CWE-476 - NULL Pointer Dereference

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 a NULL pointer dereference in mvpp2_bm_switch_buffers() when switching between per-cpu and shared buffer pool modes. A local user can trigger a buffer mode switch, such as by changing the MTU across the jumbo frame threshold, to cause a denial of service.

The issue occurs when the CM3 SRAM resource is not present in the device tree, leaving priv->cm3_base NULL while flow control updates are still attempted.


Remediation

Install update from vendor's website.

References