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
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-09-19 16:02 UTC by OSIDB Bzimport
Modified: 2025-09-19 17:03 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

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 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091904-CVE-2025-39853-a617@gregkh/T
Note You need to log in before you can comment on or make changes to this bug.