2396929 – (CVE-2025-39853) CVE-2025-39853 kernel: i40e: Fix potential invalid access when MAC list is empty

Bug 2396929 (CVE-2025-39853) - CVE-2025-39853 kernel: i40e: Fix potential invalid access when MAC list is empty

Summary: CVE-2025-39853 kernel: i40e: Fix potential invalid access when MAC list is empty

Keywords:
Status:	NEW
Alias:	CVE-2025-39853
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	medium
Severity:	medium
Target Milestone:	---
Assignee:	Product Security DevOps Team
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2025-09-19 16:02 UTC by OSIDB Bzimport
Modified:	2026-06-29 20:03 UTC (History)
CC List:	2 users (show)
Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2025-09-19 16:02:18 UTC

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

i40e: Fix potential invalid access when MAC list is empty

list_first_entry() never returns NULL - if the list is empty, it still
returns a pointer to an invalid object, leading to potential invalid
memory access when dereferenced.

Fix this by using list_first_entry_or_null instead of list_first_entry.

Comment 1 Jon Moroney 2025-09-19 17:00:25 UTC Comment hidden (spam)

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