CVE-2026-72081

Received Received - Intake

SCSI I/O Leak in Linux Kernel efct Driver

Publication date: 2026-08-15

Last updated on: 2026-08-17

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: elx: efct: Fix I/O leak on unsupported additional CDB efct_dispatch_fcp_cmd() allocates an efct_io before dispatching an unsolicited FCP command. If the command has an unsupported additional CDB, the function returns -EIO before handing the IO to the SCSI layer. Free the allocated IO before returning from this error path.

CVSS Scores

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Meta Information

Published

2026-08-15

Last Modified

2026-08-17

Generated

2026-09-05

AI Q&A

2026-08-15

EPSS Evaluated

2026-09-04

NVD

CVE-2026-72081

EUVD

EUVD-2026-59039

Affected Vendors & Products

Vendor	Product	Version / Range
elx	efct	*
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel involves a memory leak in the SCSI layer driver for Emulex (elx) efct devices. When an unsolicited FCP command with an unsupported additional CDB is received, the function efct_dispatch_fcp_cmd() allocates memory for an I/O operation but fails to free it before returning an error. This results in a memory leak.

Detection Guidance

This vulnerability is specific to the Linux kernel's SCSI driver for Emulex FCoE adapters (efct). Detection requires checking kernel logs for I/O errors related to unsupported FCP commands or CDBs. Monitor for messages like 'efct_dispatch_fcp_cmd: unsupported additional CDB' in system logs.

Impact Analysis

This vulnerability can lead to resource exhaustion on systems using the affected Linux kernel driver. Over time, repeated exploitation could cause the system to run out of memory, leading to performance degradation or crashes.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or other common standards and regulations. It is a low-level Linux kernel issue related to I/O handling in the SCSI layer, specifically affecting the efct driver for certain storage devices. There is no indication of data exposure, privacy violations, or security controls being bypassed that would impact regulatory compliance.

Mitigation Strategies

Update the Linux kernel to the latest patched version to resolve the I/O leak in the efct driver. Monitor SCSI and FCP command logs for errors related to unsupported additional CDB commands.

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