---
id: CVE-2026-80950
title: 'i3c: renesas: Check that the transfer is valid before accessing it'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  i3c: renesas: Check that the transfer is valid before accessing it

  The Renesas I3C driver uses an asynchronous model to transfer data. It
  prepares a struct renesas_i3c…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-825
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d028219a9f1485914492bf373406f6a0e665ace2 <
    0093f9fc102ba8b98561fdd2f8559553ef56be59
  - >-
    Linux >= d028219a9f1485914492bf373406f6a0e665ace2 <
    ec631aff93261c6d031f953549802322032f2aba
  - >-
    Linux >= d028219a9f1485914492bf373406f6a0e665ace2 <
    5f1a76ecfe90544a28d657306c9b3caa66ba0e63
  - Linux 6.17
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:45:34.205Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80950'
references:
  - url: 'https://git.kernel.org/stable/c/0093f9fc102ba8b98561fdd2f8559553ef56be59'
  - url: 'https://git.kernel.org/stable/c/ec631aff93261c6d031f953549802322032f2aba'
  - url: 'https://git.kernel.org/stable/c/5f1a76ecfe90544a28d657306c9b3caa66ba0e63'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80950.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80950'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532234'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80950'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80950'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80950.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00173
epssPercentile: 0.0672
scores:
  cna: 7.8
  vendor: 5.5
ingestedAt: '2026-09-14T15:23:07.476Z'
---

## Overview

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

i3c: renesas: Check that the transfer is valid before accessing it

The Renesas I3C driver uses an asynchronous model to transfer data. It
prepares a struct renesas_i3c_xfer, enqueues it, and waits for completion.
The interrupt handler dequeues the transfer, updates/uses it, and signals
the waiting thread.

If the completion times out, the waiting thread dequeues the transfer and
free it. If an interrupt fires after that, the handler may access freed
memory, leading to crashes.

Check that the transfer is still valid before accessing it in the
interrupt handler. With it clear any status flags and disable all
the interrupts to avoid triggering the same interrupts again.

## Affected

- `Linux >= d028219a9f1485914492bf373406f6a0e665ace2 < 0093f9fc102ba8b98561fdd2f8559553ef56be59`
- `Linux >= d028219a9f1485914492bf373406f6a0e665ace2 < ec631aff93261c6d031f953549802322032f2aba`
- `Linux >= d028219a9f1485914492bf373406f6a0e665ace2 < 5f1a76ecfe90544a28d657306c9b3caa66ba0e63`
- `Linux 6.17`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80950.json)