---
id: CVE-2026-72345
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net/mlx5: LAG, Fix off-by-one in single-FDB error rollback

  On failure at index i, the reverse cleanup loop in
  mlx5_lag_create_single_fdb() starts from i, so the failed…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net/mlx5: LAG, Fix off-by-one in single-FDB error rollback

  On failure at index i, the reverse cleanup loop in
  mlx5_lag_create_single_fdb() starts from i, so the failed…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ddbb5ddc43ad000a984149db5af1133433938404 <
    0be672071d6e8c4d3be6a8f796d8e47198763770
  - >-
    Linux >= ddbb5ddc43ad000a984149db5af1133433938404 <
    40cc06bf71476932e5d139fa326dcd0372766e16
  - >-
    Linux >= ddbb5ddc43ad000a984149db5af1133433938404 <
    0f0e4ae6975c773f7854fc48932a267f6c79088f
  - Linux 8330e9f0214c0f0b73c57b3f3f619b64c8035029
  - Linux >= 6.12.113 < 6.13
  - Linux 6.14
published: '2026-08-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T11:17:42.967'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72345'
references:
  - url: 'https://git.kernel.org/stable/c/0be672071d6e8c4d3be6a8f796d8e47198763770'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/0f0e4ae6975c773f7854fc48932a267f6c79088f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/40cc06bf71476932e5d139fa326dcd0372766e16'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00165
epssPercentile: 0.05349
ingestedAt: '2026-10-15T11:00:41.686Z'
---

## Overview

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

net/mlx5: LAG, Fix off-by-one in single-FDB error rollback

On failure at index i, the reverse cleanup loop in
mlx5_lag_create_single_fdb() starts from i, so the failed index
itself is rolled back. That can operate on uninitialized state or
double-tear-down a rule the add_one path already self-rolled-back.

Start the rollback from i - 1 so only successfully-installed entries
are undone.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.