Description
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.
Affected products
linux: linux kernel; debian: debian linux
References10
- git.kernel.org/stable/c/1eadabcf5623f1237a539b16586b4ed8ac8dffcd Patch
- git.kernel.org/stable/c/3c6fb929afa313d9d11f780451d113f73922fe5d Patch
- git.kernel.org/stable/c/66e7cdbda74ee823ec2bf7b830ebd235c54f5ddf Patch
- git.kernel.org/stable/c/971feafe157afac443027acdc235badc6838560b Patch
- git.kernel.org/stable/c/9c21fc4cebd44dd21016c61261a683af390343f8 Patch
- git.kernel.org/stable/c/a556f06338e1d5a85af0e32ecb46e365547f92b9 Patch
- git.kernel.org/stable/c/e2a5e74879f9b494bbd66fa93f355feacde450c7 Patch
- git.kernel.org/stable/c/fb216d980fae6561c7c70af8ef826faf059c6515 Patch
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html Mailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - EPSS — exploit probability
- 0% percentile: 6 · as of 8 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.