---
id: CVE-2026-89436
title: >-
  kernel: platform/x86: panasonic-laptop: Fix sentinel write past pcc->sinf[]
  (CVE-2026-89436)
summary: >-
  A flaw was found in the Linux kernel's `panasonic-laptop` driver. This
  vulnerability involves an out-of-bounds write when processing ACPI SINF
  packages, where a small amount of data is written beyond the intended memory
  buffer. This can le…
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-787
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T21:28:20+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89436.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89436.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89436'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532194'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89436'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89436'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89436.mbox
  - url: 'https://git.kernel.org/stable/c/329f10d8be193bf36af124e00b9dd6644cd71724'
  - url: 'https://git.kernel.org/stable/c/a93df956ee4d903735b6d395362c839cb1dc07e3'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00133
epssPercentile: 0.03193
scores:
  vendor: 4.1
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.475Z'
---

## Overview

A flaw was found in the Linux kernel's `panasonic-laptop` driver. This vulnerability involves an out-of-bounds write when processing ACPI SINF packages, where a small amount of data is written beyond the intended memory buffer. This can lead to a heap overflow, which might cause 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-2026-89436.json)

**kernel: platform/x86: panasonic-laptop: Fix sentinel write past pcc->sinf[]** — 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.