---
id: CVE-2026-89598
title: >-
  kernel: fbdev: ssd1307fb: defer I2C transfers from damage callbacks
  (CVE-2026-89598)
summary: >-
  A flaw was found in the Linux kernel's fbdev (framebuffer device) subsystem,
  specifically within the ssd1307fb driver. This vulnerability occurs when
  display damage callbacks, which handle updates to the display, perform
  synchronous I2C (I…
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-821
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T17:01:56+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89598.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89598.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89598'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532043'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89598'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89598'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89598.mbox
  - url: 'https://git.kernel.org/stable/c/237924f5b9afc93b57c87bc8efc5ea2e687855e4'
  - url: 'https://git.kernel.org/stable/c/b64f3497a0cd7bbd26d6c268eebd217d8062fcee'
  - url: 'https://git.kernel.org/stable/c/3bcab9b21f71d52bd1b2e03b80f29516bb000593'
  - url: 'https://git.kernel.org/stable/c/1981e54ac137f773fb25a7209a42b75213868306'
  - url: 'https://git.kernel.org/stable/c/9ad709afdfa32509ed64938a6d9cd00db3cd54c2'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00168
epssPercentile: 0.06449
ingestedAt: '2026-09-14T15:23:07.451Z'
---

## Overview

A flaw was found in the Linux kernel's fbdev (framebuffer device) subsystem, specifically within the ssd1307fb driver. This vulnerability occurs when display damage callbacks, which handle updates to the display, perform synchronous I2C (Inter-Integrated Circuit) transfers from an atomic context. This can lead to a 'scheduling while atomic' bug, causing system instability or a denial of service (DoS) for a local user.

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89598.json)

**kernel: fbdev: ssd1307fb: defer I2C transfers from damage callbacks** — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-14.

Affected:

- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7

## Remediation

Fix deferred