---
id: CVE-2026-98528
title: 'gpio: cdev: fix kernel stack leak to user-space in error path'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  gpio: cdev: fix kernel stack leak to user-space in error path

  If we fail to acquire the GPIO chip guard in gpio_desc_to_lineinfo(), we
  return immediately before zeroin…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 <
    8460ee5216ab9a38263b01dca4b0a27e083f70f3
  - >-
    Linux >= d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 <
    cf3d043582e106a0e57002bec8a6de8929ba3e1c
  - >-
    Linux >= d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 <
    60a466f231905cd96ae6f0f3c44a710c97873dac
  - >-
    Linux >= d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 <
    1feb5d39b05afd902ed9fc902ec5b15be03a4bdb
  - Linux 6.9
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:17:46.695Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98528'
references:
  - url: 'https://git.kernel.org/stable/c/8460ee5216ab9a38263b01dca4b0a27e083f70f3'
  - url: 'https://git.kernel.org/stable/c/cf3d043582e106a0e57002bec8a6de8929ba3e1c'
  - url: 'https://git.kernel.org/stable/c/60a466f231905cd96ae6f0f3c44a710c97873dac'
  - url: 'https://git.kernel.org/stable/c/1feb5d39b05afd902ed9fc902ec5b15be03a4bdb'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.280Z'
---

## Overview

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

gpio: cdev: fix kernel stack leak to user-space in error path

If we fail to acquire the GPIO chip guard in gpio_desc_to_lineinfo(), we
return immediately before zeroing the info struct we'll end up passing
to the user-space later in lineinfo_get_v1(). This may leak the kernel
stack contents. Make gpio_desc_to_lineinfo() return int so that the
-ENODEV returned on failure to acquire the guard can be propagated to
the callers.

While not strictly necessary: move the memset() before trying to acquire
the SRCU read lock too for good measure.

## Affected

- `Linux >= d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 < 8460ee5216ab9a38263b01dca4b0a27e083f70f3`
- `Linux >= d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 < cf3d043582e106a0e57002bec8a6de8929ba3e1c`
- `Linux >= d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 < 60a466f231905cd96ae6f0f3c44a710c97873dac`
- `Linux >= d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 < 1feb5d39b05afd902ed9fc902ec5b15be03a4bdb`
- `Linux 6.9`

## Remediation

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