---
id: CVE-2026-64547
title: 'net: usb: net1080: validate packet_len before pad-byte access in rx_fixup'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: usb: net1080: validate packet_len before pad-byte access in rx_fixup

  For an even packet_len, net1080_rx_fixup() reads the pad byte at
  skb->data[packet_len] before…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 904813cd8a0b334189da285bb05af0b18b062502 <
    f42217fa7d535e9ec4151f7971f06f6ea65e850a
  - >-
    Linux >= 904813cd8a0b334189da285bb05af0b18b062502 <
    c087749815379e9af2fdbeb08bfc33870b103958
  - >-
    Linux >= 904813cd8a0b334189da285bb05af0b18b062502 <
    e4a87126c085b097d29e17e3b7647295bba8be7c
  - >-
    Linux >= 904813cd8a0b334189da285bb05af0b18b062502 <
    685e92934f11d5e215dad58813e2f9955ac2f436
  - >-
    Linux >= 904813cd8a0b334189da285bb05af0b18b062502 <
    4dc8484be3302d187274364820d3bef6c62bde32
  - >-
    Linux >= 904813cd8a0b334189da285bb05af0b18b062502 <
    b153cfe84b1340c69a13d0957665a2bfcf21239c
  - >-
    Linux >= 904813cd8a0b334189da285bb05af0b18b062502 <
    ea866cab12db1a2100b400a8b03569e5bc0ee29a
  - >-
    Linux >= 904813cd8a0b334189da285bb05af0b18b062502 <
    03f384bc0cb8d4a1301d4f5b0baef2d980258383
  - Linux 2.6.14
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T15:42:20.565927Z'
published: '2026-07-27'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:52:51.724Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-64547'
references:
  - url: 'https://git.kernel.org/stable/c/f42217fa7d535e9ec4151f7971f06f6ea65e850a'
  - url: 'https://git.kernel.org/stable/c/c087749815379e9af2fdbeb08bfc33870b103958'
  - url: 'https://git.kernel.org/stable/c/e4a87126c085b097d29e17e3b7647295bba8be7c'
  - url: 'https://git.kernel.org/stable/c/685e92934f11d5e215dad58813e2f9955ac2f436'
  - url: 'https://git.kernel.org/stable/c/4dc8484be3302d187274364820d3bef6c62bde32'
  - url: 'https://git.kernel.org/stable/c/b153cfe84b1340c69a13d0957665a2bfcf21239c'
  - url: 'https://git.kernel.org/stable/c/ea866cab12db1a2100b400a8b03569e5bc0ee29a'
  - url: 'https://git.kernel.org/stable/c/03f384bc0cb8d4a1301d4f5b0baef2d980258383'
tags:
  - cve.org
epss: 0.00274
epssPercentile: 0.18487
ingestedAt: '2026-10-16T17:24:46.831Z'
---

## Overview

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

net: usb: net1080: validate packet_len before pad-byte access in rx_fixup

For an even packet_len, net1080_rx_fixup() reads the pad byte at
skb->data[packet_len] before the skb->len != packet_len check further
down, and packet_len is only bounded against NC_MAX_PACKET. A malicious
NetChip 1080 device can send a short frame advertising a large even
packet_len (e.g. 0x4000), so the pad-byte read lands past the end of the
skb:

  BUG: KASAN: slab-out-of-bounds in net1080_rx_fixup
  Read of size 1 at addr ffff8880106c83c6 by task ksoftirqd/0/14
   ...
   net1080_rx_fixup (drivers/net/usb/net1080.c:384)
   usbnet_bh (drivers/net/usb/usbnet.c:1589)
   process_one_work (kernel/workqueue.c:3322)
   bh_worker (kernel/workqueue.c:3708)
   tasklet_action (kernel/softirq.c:965)
   handle_softirqs (kernel/softirq.c:622)
   ...

Reject the frame when packet_len >= skb->len before reading.

## Affected

- `Linux >= 904813cd8a0b334189da285bb05af0b18b062502 < f42217fa7d535e9ec4151f7971f06f6ea65e850a`
- `Linux >= 904813cd8a0b334189da285bb05af0b18b062502 < c087749815379e9af2fdbeb08bfc33870b103958`
- `Linux >= 904813cd8a0b334189da285bb05af0b18b062502 < e4a87126c085b097d29e17e3b7647295bba8be7c`
- `Linux >= 904813cd8a0b334189da285bb05af0b18b062502 < 685e92934f11d5e215dad58813e2f9955ac2f436`
- `Linux >= 904813cd8a0b334189da285bb05af0b18b062502 < 4dc8484be3302d187274364820d3bef6c62bde32`
- `Linux >= 904813cd8a0b334189da285bb05af0b18b062502 < b153cfe84b1340c69a13d0957665a2bfcf21239c`
- `Linux >= 904813cd8a0b334189da285bb05af0b18b062502 < ea866cab12db1a2100b400a8b03569e5bc0ee29a`
- `Linux >= 904813cd8a0b334189da285bb05af0b18b062502 < 03f384bc0cb8d4a1301d4f5b0baef2d980258383`
- `Linux 2.6.14`

## Remediation

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