---
id: CVE-2026-98668
title: 'iio: buffer: Ensure bounce buffer used for unaligned case is zeroed.'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iio: buffer: Ensure bounce buffer used for unaligned case is zeroed.

  iio_push_to_buffers_with_ts_unaligned() leaks uninitialized heap memory
  to userspace if the data p…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <
    b5c2f21f645e40c70fda2a4283e6f2a81e5cb9f2
  - >-
    Linux >= 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <
    b134ef820610bd873c9d59999d9824710964ce82
  - >-
    Linux >= 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <
    3a87212b1a09a1fdd730ce5520f7b1fc0b488511
  - >-
    Linux >= 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <
    5330036bc68d23672bfcc16c60c54701ae123083
  - Linux 5.16
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:44:55.291Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98668'
references:
  - url: 'https://git.kernel.org/stable/c/b5c2f21f645e40c70fda2a4283e6f2a81e5cb9f2'
  - url: 'https://git.kernel.org/stable/c/b134ef820610bd873c9d59999d9824710964ce82'
  - url: 'https://git.kernel.org/stable/c/3a87212b1a09a1fdd730ce5520f7b1fc0b488511'
  - url: 'https://git.kernel.org/stable/c/5330036bc68d23672bfcc16c60c54701ae123083'
tags:
  - cve.org
ingestedAt: '2026-10-18T16:47:32.533Z'
---

## Overview

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

iio: buffer: Ensure bounce buffer used for unaligned case is zeroed.

iio_push_to_buffers_with_ts_unaligned() leaks uninitialized heap memory
to userspace if the data passed in is not a multiple of 8 bytes and the
timestamp is enabled. Specify __GFP_ZERO for the devm_krealloc()
to ensure any extra space is cleared.

## Affected

- `Linux >= 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 < b5c2f21f645e40c70fda2a4283e6f2a81e5cb9f2`
- `Linux >= 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 < b134ef820610bd873c9d59999d9824710964ce82`
- `Linux >= 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 < 3a87212b1a09a1fdd730ce5520f7b1fc0b488511`
- `Linux >= 95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 < 5330036bc68d23672bfcc16c60c54701ae123083`
- `Linux 5.16`

## Remediation

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