---
id: CVE-2026-72017
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: macb: drop in-flight Tx SKBs on close

  The MACB driver has since forever leaked the outgoing SKBs that
  have not yet been marked as completed
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: macb: drop in-flight Tx SKBs on close

  The MACB driver has since forever leaked the outgoing SKBs that
  have not yet been marked as completed. They live in queue->t…
severity: none
published: '2026-08-15'
updated: '2026-08-23'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72017'
references:
  - url: 'https://git.kernel.org/stable/c/0e9797dc4ebdefe1b7f931b1f92d5e98e5dbf655'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/109241d9880488aafd8e104832b4d4859ad57244'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/26b131b2d5b55a81ef6182769d28105a870c0eb2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/27f575836cfebbf872dec020428742b10650a955'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6124bd785073659c99385094657b77382ebce11b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00206
epssPercentile: 0.10936
ingestedAt: '2026-08-23T13:48:07.395Z'
---

## Overview

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

net: macb: drop in-flight Tx SKBs on close

The MACB driver has since forever leaked the outgoing SKBs that
have not yet been marked as completed. They live in queue->tx_skb
which gets freed without remorse nor checking.

macb_free_consistent() gets called in a few codepaths, but only close will
trigger the added expressions. In macb_open() and macb_alloc_consistent()
failure cases, queues' tx_skb just got allocated and are empty.

## Remediation

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