---
id: CVE-2026-31563
title: 'net: macb: Use dev_consume_skb_any() to free TX SKBs'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: macb: Use dev_consume_skb_any() to free TX SKBs

  The napi_consume_skb() function is not intended to be called in an IRQ
  disabled context. However, after commit 6bc…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= aeeafeb29b1b270302a9a85a13f7d70a68a3b9e6 <
    92e7081f0c79d9073087e54bab745bb184192c2e
  - >-
    Linux >= 5430388a81113e62a2d48b5d7dc1e76231908ebf <
    78c8b090a3d5c1689dc989861b0163180db2b3f8
  - >-
    Linux >= 7db8aa3fc4ed0a2928246747b2514b0741a8187e <
    984350b37372f79f71d4f0a5264c640e40daf9ce
  - >-
    Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 <
    f4bc91398b579730284328322365afa77a9d568f
  - >-
    Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 <
    ca4d05afb4683d685bb2c6fccae4386c478f524a
  - >-
    Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 <
    647b8a2fe474474704110db6bd07f7a139e621eb
  - Linux a4cb0a15ab8e6d06c08229a2c7bdbe1f2454473f
  - Linux >= 6.1.151 < 6.1.168
  - Linux >= 6.6.105 < 6.6.131
  - Linux >= 6.12.46 < 6.12.80
  - Linux >= 6.16.6 < 6.17
  - Linux 6.17
published: '2026-04-24'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T08:47:45.128Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-31563'
references:
  - url: 'https://git.kernel.org/stable/c/92e7081f0c79d9073087e54bab745bb184192c2e'
  - url: 'https://git.kernel.org/stable/c/78c8b090a3d5c1689dc989861b0163180db2b3f8'
  - url: 'https://git.kernel.org/stable/c/984350b37372f79f71d4f0a5264c640e40daf9ce'
  - url: 'https://git.kernel.org/stable/c/f4bc91398b579730284328322365afa77a9d568f'
  - url: 'https://git.kernel.org/stable/c/ca4d05afb4683d685bb2c6fccae4386c478f524a'
  - url: 'https://git.kernel.org/stable/c/647b8a2fe474474704110db6bd07f7a139e621eb'
tags:
  - cve.org
epss: 0.00716
epssPercentile: 0.51785
ingestedAt: '2026-09-08T15:33:26.990Z'
---

## Overview

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

net: macb: Use dev_consume_skb_any() to free TX SKBs

The napi_consume_skb() function is not intended to be called in an IRQ
disabled context. However, after commit 6bc8a5098bf4 ("net: macb: Fix
tx_ptr_lock locking"), the freeing of TX SKBs is performed with IRQs
disabled. To resolve the following call trace, use dev_consume_skb_any()
for freeing TX SKBs:
   WARNING: kernel/softirq.c:430 at __local_bh_enable_ip+0x174/0x188, CPU#0: ksoftirqd/0/15
   Modules linked in:
   CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 7.0.0-rc4-next-20260319-yocto-standard-dirty #37 PREEMPT
   Hardware name: ZynqMP ZCU102 Rev1.1 (DT)
   pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
   pc : __local_bh_enable_ip+0x174/0x188
   lr : local_bh_enable+0x24/0x38
   sp : ffff800082b3bb10
   x29: ffff800082b3bb10 x28: ffff0008031f3c00 x27: 000000000011ede0
   x26: ffff000800a7ff00 x25: ffff800083937ce8 x24: 0000000000017a80
   x23: ffff000803243a78 x22: 0000000000000040 x21: 0000000000000000
   x20: ffff000800394c80 x19: 0000000000000200 x18: 0000000000000001
   x17: 0000000000000001 x16: ffff000803240000 x15: 0000000000000000
   x14: ffffffffffffffff x13: 0000000000000028 x12: ffff000800395650
   x11: ffff8000821d1528 x10: ffff800081c2bc08 x9 : ffff800081c1e258
   x8 : 0000000100000301 x7 : ffff8000810426ec x6 : 0000000000000000
   x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000
   x2 : 0000000000000008 x1 : 0000000000000200 x0 : ffff8000810428dc
   Call trace:
    __local_bh_enable_ip+0x174/0x188 (P)
    local_bh_enable+0x24/0x38
    skb_attempt_defer_free+0x190/0x1d8
    napi_consume_skb+0x58/0x108
    macb_tx_poll+0x1a4/0x558
    __napi_poll+0x50/0x198
    net_rx_action+0x1f4/0x3d8
    handle_softirqs+0x16c/0x560
    run_ksoftirqd+0x44/0x80
    smpboot_thread_fn+0x1d8/0x338
    kthread+0x120/0x150
    ret_from_fork+0x10/0x20
   irq event stamp: 29751
   hardirqs last  enabled at (29750): [<ffff8000813be184>] _raw_spin_unlock_irqrestore+0x44/0x88
   hardirqs last disabled at (29751): [<ffff8000813bdf60>] _raw_spin_lock_irqsave+0x38/0x98
   softirqs last  enabled at (29150): [<ffff8000800f1aec>] handle_softirqs+0x504/0x560
   softirqs last disabled at (29153): [<ffff8000800f2fec>] run_ksoftirqd+0x44/0x80

## Affected

- `Linux >= aeeafeb29b1b270302a9a85a13f7d70a68a3b9e6 < 92e7081f0c79d9073087e54bab745bb184192c2e`
- `Linux >= 5430388a81113e62a2d48b5d7dc1e76231908ebf < 78c8b090a3d5c1689dc989861b0163180db2b3f8`
- `Linux >= 7db8aa3fc4ed0a2928246747b2514b0741a8187e < 984350b37372f79f71d4f0a5264c640e40daf9ce`
- `Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 < f4bc91398b579730284328322365afa77a9d568f`
- `Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 < ca4d05afb4683d685bb2c6fccae4386c478f524a`
- `Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 < 647b8a2fe474474704110db6bd07f7a139e621eb`
- `Linux a4cb0a15ab8e6d06c08229a2c7bdbe1f2454473f`
- `Linux >= 6.1.151 < 6.1.168`
- `Linux >= 6.6.105 < 6.6.131`
- `Linux >= 6.12.46 < 6.12.80`
- `Linux >= 6.16.6 < 6.17`
- `Linux 6.17`

## Remediation

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