SB20260916143 - Improper Enforcement of Behavioral Workflow in Linux kernel nvme target driver

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260916143

SB20260916143 - Improper Enforcement of Behavioral Workflow in Linux kernel nvme target driver

Published: September 16, 2026

Security Bulletin ID SB20260916143
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) Improper Enforcement of Behavioral Workflow (CVE-ID: CVE-2026-89968)

CWE-ID: CWE-841 - Improper Enforcement of Behavioral Workflow

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 improper validation of protocol state in nvmet_tcp_handle_h2c_data_pdu() when processing an unsolicited H2CData PDU before transmitting a requested data transfer (R2T). A remote attacker can send an H2CData PDU for a write command before the R2T is transmitted to cause a denial of service.

The affected subsystem must be configured with allow_any_host.


Remediation

Install update from vendor's website.

References