BaseFortify

Publication date: 2025-10-04

Last updated on: 2026-06-19

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path During tests of another unrelated patch I was able to trigger this error: Objects remaining on __kmem_cache_shutdown()

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-04

Last Modified

2026-06-19

Generated

2026-07-06

AI Q&A

2025-10-04

EPSS Evaluated

2026-07-05

NVD

CVE-2025-39929

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 5.15.160 (inc) to 5.16 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is a memory leak in the Linux kernel's SMB client component. Specifically, the smbdirect_recv_io function leaks memory in the smbd_negotiate() error path, which was identified during testing. The issue involves objects remaining allocated on __kmem_cache_shutdown(), indicating improper cleanup of resources when an error occurs.

Impact Analysis

The memory leak in the SMB client could lead to increased memory usage over time, potentially causing system instability or degraded performance if the leak is triggered repeatedly. This could affect systems relying on SMB client functionality in the Linux kernel.

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