---
id: CVE-2026-80953
title: >-
  kernel: i3c: master: adi: initialize the lock before enabling interrupts
  (CVE-2026-80953)
summary: >-
  A flaw was found in the Linux kernel's i3c master driver. A race condition
  exists where the `adi_i3c_master_probe()` function requests an interrupt and
  unmasks a register before a critical lock (`xferqueue.lock`) is properly
  initialized. T…
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-909
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T17:36:06+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80953.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80953.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80953'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532115'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80953'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80953'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80953.mbox
  - url: 'https://git.kernel.org/stable/c/8a53f9102a0d3eeb8784999f925028acf339c276'
  - url: 'https://git.kernel.org/stable/c/a15a1b95de980362c14f32f519b293b0d12ce86f'
  - url: 'https://git.kernel.org/stable/c/de8c32b0a246bbb4b44ec29e12769496a0bf66f7'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00194
epssPercentile: 0.07985
scores:
  vendor: 4.4
  cna: 8.4
ingestedAt: '2026-09-14T15:23:07.476Z'
---

## Overview

A flaw was found in the Linux kernel's i3c master driver. A race condition exists where the `adi_i3c_master_probe()` function requests an interrupt and unmasks a register before a critical lock (`xferqueue.lock`) is properly initialized. This allows a pending interrupt to attempt to acquire an uninitialized lock, which can lead to a kernel crash and a denial of service. This issue can be triggered by a local attacker.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80953.json)

**kernel: i3c: master: adi: initialize the lock before enabling interrupts** — 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.