CVE-2025-39929: smb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path

Published Oct 4, 2025
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix smbdirectrecvio leak in smbdnegotiate() error path

During tests of another unrelated patch I was able to trigger this error: Objects remaining on kmemcacheshutdown()

Affected Software

13 affected componentsFixes available
Linux Kernel
Microsoft azl3 kernel 6.6.96.2-2
Microsoft azl3 kernel 6.6.104.2-4
Linux Linux kernel>=4.16<6.1.154
Linux Linux kernel>=6.2<6.6.108
Linux Linux kernel>=6.7<6.12.49
Linux Linux kernel>=6.13<6.16.9
Linux Linux kernel=6.17-rc1
Linux Linux kernel=6.17-rc2
Linux Linux kernel=6.17-rc3
Linux Linux kernel=6.17-rc4
Linux Linux kernel=6.17-rc5
Linux Linux kernel=6.17-rc6

Event History

Oct 4, 2025
CVE Published
via MITRE·07:30 AM
Data Sourced
via MITRE·07:30 AM
DescriptionSeverity
Data Sourced
via NVD·08:15 AM
RemedyDescriptionSeverityWeaknessAffected Software
Oct 5, 2025
Data Sourced
via Microsoft·01:02 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·01:02 AM
Affected Software
Updated
via Microsoft·01:02 AM
DescriptionSeverity

Frequently Asked Questions

1

What is the severity of CVE-2025-39929?

CVE-2025-39929 is categorized as a medium-severity vulnerability in the Linux kernel.

2

How do I fix CVE-2025-39929?

To fix CVE-2025-39929, update your Linux kernel to the latest patched version provided by your distribution.

3

What does CVE-2025-39929 affect?

CVE-2025-39929 affects the Linux kernel specifically in the smb client handling of smbdirect_recv_io.

4

What are the potential impacts of CVE-2025-39929?

The impact of CVE-2025-39929 could include memory leaks and reduced performance in systems using affected SMB functionalities.

5

Is CVE-2025-39929 related to other vulnerabilities?

CVE-2025-39929 was mentioned during tests related to another vulnerability but stands as an independent issue.

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