---
id: CVE-2026-80645
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  rapidio/tsi721: prevent a bad dereference in tsi721_db_dpc()

  With a list_for_each() loop, if we don't find the item we are looking for
  in the list, then the loop exits…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  rapidio/tsi721: prevent a bad dereference in tsi721_db_dpc()

  With a list_for_each() loop, if we don't find the item we are looking for
  in the list, then the loop exits…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'
published: '2026-08-28'
updated: '2026-08-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80645'
references:
  - url: 'https://git.kernel.org/stable/c/070f356ea4f419e4e85e4089381f4477f41d969e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/13092966ba5d8fb214a4efeddc87f9ed0fd2f945'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3b5c66e922aa6a3331915a14520848a5b3beccc7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/81c06ef66c3ab6eeaa72eb790c90ae043cdb3d43'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9e775c3199903d7c09a52530042b1198eab705bd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/acd54f42abbbd806464468838dbc04efd203d2be'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dc28a14f3e4546b2b06098d24177942540581a5f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fc15e3a30ddd950f009c76765331783b9af94a87'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00402
epssPercentile: 0.31615
ingestedAt: '2026-08-30T03:46:31.218Z'
---

## Overview

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

rapidio/tsi721: prevent a bad dereference in tsi721_db_dpc()

With a list_for_each() loop, if we don't find the item we are looking for
in the list, then the loop exits with the iterator, which is "dbell" in
this loop, pointing to invalid memory.

This code uses the "found" variable to determine if we have found the
doorbell we are looking for or not.  However, the problem that the "found"
variable needs to be set to false at the start of each iteration,
otherwise after the first correct doorbell, then everything is marked as
found.

Reset the "found" to false at the start of the iteration and move the
variable inside the loop.

## Remediation

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