Bug 2393731 (CVE-2025-39730)

Summary:	CVE-2025-39730 kernel: NFS: Fix filehandle bounds checking in nfs_fh_to_dentry()
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw out of boundary read in the Linux kernel NFS functionality was found in the way connected user sends malicious data to the server. A remote user could use this flaw to crash the system.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-09-07 16:01:12 UTC

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

NFS: Fix filehandle bounds checking in nfs_fh_to_dentry()

The function needs to check the minimal filehandle length before it can
access the embedded filehandle.

Comment 1 Mauro Matteo Cascella 2025-09-09 08:14:41 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090730-CVE-2025-39730-72c9@gregkh/T

Comment 2 errata-xmlrpc 2025-10-06 15:38:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:17398 https://access.redhat.com/errata/RHSA-2025:17398

Comment 3 errata-xmlrpc 2025-10-06 21:36:07 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:17397 https://access.redhat.com/errata/RHSA-2025:17397