Double Free Vulnerability in Linux Kernel QLA2xxx FC Port

Publication date: 2026-05-08

Last updated on: 2026-07-08

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Completely fix fcport double free In qla24xx_els_dcmd_iocb() sp->free is set to qla2x00_els_dcmd_sp_free(). When an error happens, this function is called by qla2x00_sp_release(), when kref_put() releases the first and the last reference. qla2x00_els_dcmd_sp_free() frees fcport by calling qla2x00_free_fcport(). Doing it one more time after kref_put() is a bad idea.

CVSS Scores

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Meta Information

Published

2026-05-08

Last Modified

2026-07-08

Generated

2026-07-09

AI Q&A

2026-05-08

EPSS Evaluated

2026-07-08

NVD

CVE-2026-43414

EUVD

EUVD-2026-28720

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	From 5.15.154 (inc) to 5.16 (exc)
linux	linux_kernel	From 6.8.3 (inc) to 6.9 (exc)
linux	linux_kernel	From 6.7.12 (inc) to 6.8 (exc)
linux	linux_kernel	6.9
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	From 6.1.84 (inc) to 6.2 (exc)
linux	linux_kernel	From 6.6.24 (inc) to 6.7 (exc)
linux	linux_kernel	From 6.9.1 (inc) to 6.19.9 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-415	The product calls free() twice on the same memory address.

Attack-Flow Graph

Executive Summary

This vulnerability is a double free issue in the Linux kernel's qla2xxx SCSI driver. Specifically, in the function qla24xx_els_dcmd_iocb(), a pointer (sp->free) is set to a function that frees a resource called fcport. When an error occurs, this free function is called twice: once during the release of the first reference and again during the release of the last reference via kref_put(). Calling the free function twice on the same resource leads to a double free vulnerability.

Impact Analysis

A double free vulnerability can lead to undefined behavior such as memory corruption, system crashes, or potential exploitation by attackers to execute arbitrary code or escalate privileges. In this case, the double free of the fcport resource in the Linux kernel's SCSI driver could compromise system stability or security.

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