---
id: CVE-2026-80954
title: >-
  kernel: i3c: Fix unlocked dereference of dev->desc in
  i3c_device_get_supported_xfer_mode() (CVE-2026-80954)
summary: >-
  A flaw was found in the Linux kernel's i3c driver. The
  `i3c_device_get_supported_xfer_mode()` function attempts to access a device
  descriptor without holding the necessary lock. This unlocked dereference can
  lead to memory corruption, pote…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-476
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T17:36:10+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80954.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80954.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80954'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532524'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80954'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80954'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80954.mbox
  - url: 'https://git.kernel.org/stable/c/251db58324ea4792c3f9f692ab09be148e051969'
  - url: 'https://git.kernel.org/stable/c/8bed7f4fa710914b7f05fd59998316bfb4d43385'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00165
epssPercentile: 0.05082
scores:
  vendor: 4.4
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.476Z'
---

## Overview

A flaw was found in the Linux kernel's i3c driver. The `i3c_device_get_supported_xfer_mode()` function attempts to access a device descriptor without holding the necessary lock. This unlocked dereference can lead to memory corruption, potentially causing system instability or a denial of service.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80954.json)

**kernel: i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Refer to the advisory for fix availability.