---
id: CVE-2024-26748
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: cdns3: fix memory double free when handle zero packet

  829  if (request->complete) {
  830          spin_unlock(&priv_dev->lock);
  831          usb_gadget_giveback_re…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: cdns3: fix memory double free when handle zero packet

  829  if (request->complete) {
  830          spin_unlock(&priv_dev->lock);
  831          usb_gadget_giveback_re…
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'
cwe:
  - CWE-415
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.4, < 5.4.270'
  - 'linux_kernel >= 5.5, < 5.10.211'
  - 'linux_kernel >= 5.11, < 5.15.150'
  - 'linux_kernel >= 5.16, < 6.1.80'
  - 'linux_kernel >= 6.2, < 6.6.19'
  - 'linux_kernel >= 6.7, < 6.7.7'
  - linux_kernel = 6.8
patched:
  - linux_kernel 6.7.7
published: '2024-04-03'
updated: '2026-08-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-26748'
references:
  - url: 'https://git.kernel.org/stable/c/1e204a8e9eb514e22a6567fb340ebb47df3f3a48'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3a2a909942b5335b7ea66366d84261b3ed5f89c8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5fd9e45f1ebcd57181358af28506e8a661a260b3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/70e8038813f9d3e72df966748ebbc40efe466019'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/92d20406a3d4ff3e8be667c79209dc9ed31df5b3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9a52b694b066f299d8b9800854a8503457a8b64c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/aad6132ae6e4809e375431f8defd1521985e44e7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1e204a8e9eb514e22a6567fb340ebb47df3f3a48'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/3a2a909942b5335b7ea66366d84261b3ed5f89c8'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/5fd9e45f1ebcd57181358af28506e8a661a260b3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/70e8038813f9d3e72df966748ebbc40efe466019'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/92d20406a3d4ff3e8be667c79209dc9ed31df5b3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/9a52b694b066f299d8b9800854a8503457a8b64c'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/aad6132ae6e4809e375431f8defd1521985e44e7'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00242
epssPercentile: 0.13691
ingestedAt: '2026-08-05T10:46:48.422Z'
---

## Overview

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

usb: cdns3: fix memory double free when handle zero packet

829  if (request->complete) {
830          spin_unlock(&priv_dev->lock);
831          usb_gadget_giveback_request(&priv_ep->endpoint,
832                                    request);
833          spin_lock(&priv_dev->lock);
834  }
835
836  if (request->buf == priv_dev->zlp_buf)
837      cdns3_gadget_ep_free_request(&priv_ep->endpoint, request);

Driver append an additional zero packet request when queue a packet, which
length mod max packet size is 0. When transfer complete, run to line 831,
usb_gadget_giveback_request() will free this requestion. 836 condition is
true, so cdns3_gadget_ep_free_request() free this request again.

Log:

[ 1920.140696][  T150] BUG: KFENCE: use-after-free read in cdns3_gadget_giveback+0x134/0x2c0 [cdns3]
[ 1920.140696][  T150]
[ 1920.151837][  T150] Use-after-free read at 0x000000003d1cd10b (in kfence-#36):
[ 1920.159082][  T150]  cdns3_gadget_giveback+0x134/0x2c0 [cdns3]
[ 1920.164988][  T150]  cdns3_transfer_completed+0x438/0x5f8 [cdns3]

Add check at line 829, skip call usb_gadget_giveback_request() if it is
additional zero length packet request. Needn't call
usb_gadget_giveback_request() because it is allocated in this driver.

## Affected

- `linux_kernel >= 5.4, < 5.4.270`
- `linux_kernel >= 5.5, < 5.10.211`
- `linux_kernel >= 5.11, < 5.15.150`
- `linux_kernel >= 5.16, < 6.1.80`
- `linux_kernel >= 6.2, < 6.6.19`
- `linux_kernel >= 6.7, < 6.7.7`
- `linux_kernel = 6.8`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.7.7`