Main Vulnerability Database Vulnerabilities #VU150439

Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-89842

Published: September 17, 2026

Vulnerability identifier: #VU150439

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-89842

CWE-ID: CWE-754

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to trigger an unintended firmware doorbell write.

The vulnerability exists due to improper firmware state validation in qla_nvme_xmt_ls_rsp and qla2xxx_process_purls_pkt when handling NVMe LS responses or PURLS packets while firmware is stopped or resetting. A local user can cause an LS reject IOCB to be emitted to trigger an unintended firmware doorbell write.

Affected software

Linux kernel

How to mitigate CVE-2026-89842

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3

External References

Related Security Bulletins