---
id: CVE-2026-93119
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: ljca: bound bank_num in ljca_enumerate_gpio()

  ljca_enumerate_gpio() reads desc->bank_num from the device and loops
  valid_pin[i] = get_unaligned_le32(...) for i < …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: ljca: bound bank_num in ljca_enumerate_gpio()

  ljca_enumerate_gpio() reads desc->bank_num from the device and loops
  valid_pin[i] = get_unaligned_le32(...) for i < …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= acd6199f195d6de814ac4090ce0864a613b1580e <
    0069593170a3d177de793c9a0b36989c4f069111
  - >-
    Linux >= acd6199f195d6de814ac4090ce0864a613b1580e <
    aed958c4f784a29cf42abb3e54af51a16bddde46
  - >-
    Linux >= acd6199f195d6de814ac4090ce0864a613b1580e <
    9c4bc8f7426aa001387800bf0140bfc5087a6de3
  - >-
    Linux >= acd6199f195d6de814ac4090ce0864a613b1580e <
    dd9483726d0f16c1a56879c3edb65128259a4e2b
  - Linux 6.7
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:18:06.553'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93119'
references:
  - url: 'https://git.kernel.org/stable/c/0069593170a3d177de793c9a0b36989c4f069111'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9c4bc8f7426aa001387800bf0140bfc5087a6de3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/aed958c4f784a29cf42abb3e54af51a16bddde46'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dd9483726d0f16c1a56879c3edb65128259a4e2b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.751Z'
epss: 0.00209
epssPercentile: 0.09829
---

## Overview

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

usb: ljca: bound bank_num in ljca_enumerate_gpio()

ljca_enumerate_gpio() reads desc->bank_num from the device and loops
valid_pin[i] = get_unaligned_le32(...) for i < bank_num. valid_pin[]
holds only LJCA_MAX_GPIO_NUM / 32 = 2 entries.

Two checks run before the loop. The reply length must match
struct_size(desc, bank_desc, bank_num). The product
pins_per_bank * bank_num must not exceed LJCA_MAX_GPIO_NUM. Neither one
bounds bank_num against the size of valid_pin[]. The reply is capped at
LJCA_MAX_PAYLOAD_SIZE (60) bytes, so the struct_size check limits
bank_num to 9. A device that reports bank_num 9 with pins_per_bank 7
still passes both checks. gpio_num is 63 and the reply is 56 bytes. The
loop then writes nine u32 into the two entry array and overruns
valid_pin[] on the stack.

A broken or malicious LJCA device can therefore overflow the stack.
Reject a bank_num that does not fit valid_pin[].

## Remediation

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