---
id: CVE-2023-53548
title: 'net: usbnet: Fix WARNING in usbnet_start_xmit/usb_submit_urb'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: usbnet: Fix WARNING in usbnet_start_xmit/usb_submit_urb

  The syzbot fuzzer identified a problem in the usbnet driver:

  usb 1-1: BOGUS urb xfer, pipe 3 != type 1
  WA…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2e55cc7210fef90f88201e860d8767594974574e <
    a0715d04cf687a7e21f0d6ac8c1d479294a3f6f8
  - >-
    Linux >= 2e55cc7210fef90f88201e860d8767594974574e <
    53c250ea57cf03af41339234b9855ae284f9db91
  - >-
    Linux >= 2e55cc7210fef90f88201e860d8767594974574e <
    a05ac5d00eb7fcb2fda806caa4f56e88df6bc6bb
  - >-
    Linux >= 2e55cc7210fef90f88201e860d8767594974574e <
    ec0d0be41721aca683c5606354a58ee2c687e3f8
  - >-
    Linux >= 2e55cc7210fef90f88201e860d8767594974574e <
    27d0f755d649d388fcd12f01436c9a33289e14e3
  - >-
    Linux >= 2e55cc7210fef90f88201e860d8767594974574e <
    1bebbd9b8037a9cc75984317cb495dec4824c399
  - >-
    Linux >= 2e55cc7210fef90f88201e860d8767594974574e <
    0dd3e0c31bf3e933fb85faf1443833aef90b8e46
  - >-
    Linux >= 2e55cc7210fef90f88201e860d8767594974574e <
    5e1627cb43ddf1b24b92eb26f8d958a3f5676ccb
  - Linux 2.6.14
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:23:35.592043Z'
published: '2025-10-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:31:14.343Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-53548'
references:
  - url: 'https://git.kernel.org/stable/c/a0715d04cf687a7e21f0d6ac8c1d479294a3f6f8'
  - url: 'https://git.kernel.org/stable/c/53c250ea57cf03af41339234b9855ae284f9db91'
  - url: 'https://git.kernel.org/stable/c/a05ac5d00eb7fcb2fda806caa4f56e88df6bc6bb'
  - url: 'https://git.kernel.org/stable/c/ec0d0be41721aca683c5606354a58ee2c687e3f8'
  - url: 'https://git.kernel.org/stable/c/27d0f755d649d388fcd12f01436c9a33289e14e3'
  - url: 'https://git.kernel.org/stable/c/1bebbd9b8037a9cc75984317cb495dec4824c399'
  - url: 'https://git.kernel.org/stable/c/0dd3e0c31bf3e933fb85faf1443833aef90b8e46'
  - url: 'https://git.kernel.org/stable/c/5e1627cb43ddf1b24b92eb26f8d958a3f5676ccb'
tags:
  - cve.org
epss: 0.0016
epssPercentile: 0.05162
ingestedAt: '2026-11-05T22:38:31.810Z'
---

## Overview

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

net: usbnet: Fix WARNING in usbnet_start_xmit/usb_submit_urb

The syzbot fuzzer identified a problem in the usbnet driver:

usb 1-1: BOGUS urb xfer, pipe 3 != type 1
WARNING: CPU: 0 PID: 754 at drivers/usb/core/urb.c:504 usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504
Modules linked in:
CPU: 0 PID: 754 Comm: kworker/0:2 Not tainted 6.4.0-rc7-syzkaller-00014-g692b7dc87ca6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: mld mld_ifc_work
RIP: 0010:usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504
Code: 7c 24 18 e8 2c b4 5b fb 48 8b 7c 24 18 e8 42 07 f0 fe 41 89 d8 44 89 e1 4c 89 ea 48 89 c6 48 c7 c7 a0 c9 fc 8a e8 5a 6f 23 fb <0f> 0b e9 58 f8 ff ff e8 fe b3 5b fb 48 81 c5 c0 05 00 00 e9 84 f7
RSP: 0018:ffffc9000463f568 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88801eb28000 RSI: ffffffff814c03b7 RDI: 0000000000000001
RBP: ffff8881443b7190 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000003
R13: ffff88802a77cb18 R14: 0000000000000003 R15: ffff888018262500
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556a99c15a18 CR3: 0000000028c71000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 usbnet_start_xmit+0xfe5/0x2190 drivers/net/usb/usbnet.c:1453
 __netdev_start_xmit include/linux/netdevice.h:4918 [inline]
 netdev_start_xmit include/linux/netdevice.h:4932 [inline]
 xmit_one net/core/dev.c:3578 [inline]
 dev_hard_start_xmit+0x187/0x700 net/core/dev.c:3594
...

This bug is caused by the fact that usbnet trusts the bulk endpoint
addresses its probe routine receives in the driver_info structure, and
it does not check to see that these endpoints actually exist and have
the expected type and directions.

The fix is simply to add such a check.

## Affected

- `Linux >= 2e55cc7210fef90f88201e860d8767594974574e < a0715d04cf687a7e21f0d6ac8c1d479294a3f6f8`
- `Linux >= 2e55cc7210fef90f88201e860d8767594974574e < 53c250ea57cf03af41339234b9855ae284f9db91`
- `Linux >= 2e55cc7210fef90f88201e860d8767594974574e < a05ac5d00eb7fcb2fda806caa4f56e88df6bc6bb`
- `Linux >= 2e55cc7210fef90f88201e860d8767594974574e < ec0d0be41721aca683c5606354a58ee2c687e3f8`
- `Linux >= 2e55cc7210fef90f88201e860d8767594974574e < 27d0f755d649d388fcd12f01436c9a33289e14e3`
- `Linux >= 2e55cc7210fef90f88201e860d8767594974574e < 1bebbd9b8037a9cc75984317cb495dec4824c399`
- `Linux >= 2e55cc7210fef90f88201e860d8767594974574e < 0dd3e0c31bf3e933fb85faf1443833aef90b8e46`
- `Linux >= 2e55cc7210fef90f88201e860d8767594974574e < 5e1627cb43ddf1b24b92eb26f8d958a3f5676ccb`
- `Linux 2.6.14`

## Remediation

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