SB20260918442 - NULL pointer dereference in Linux kernel nvme target driver

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Main Vulnerability Database SB20260918442

SB20260918442 - NULL pointer dereference in Linux kernel nvme target driver

Published: September 18, 2026

Security Bulletin ID SB20260918442
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2026-90228)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a null pointer dereference in nvmet_execute_identify_ns_zns() when processing a host-supplied Identify command with CNS 05h and CSI 02h targeting a file-backed namespace. A remote attacker can send a crafted Identify command targeting a file-backed namespace to cause a denial of service.

The issue is reachable only when CONFIG_BLK_DEV_ZONED is enabled.


Remediation

Install update from vendor's website.

References