---
id: CVE-2026-89588
title: >-
  kernel: ACPI: APEI: GHES: fix ARM section length accounting after header
  (CVE-2026-89588)
summary: >-
  A flaw was found in the Linux kernel's Advanced Configuration and Power
  Interface (ACPI) APEI Generic Hardware Error Source (GHES) component.
  Incorrect length accounting in the `ghes_handle_arm_hw_error()` function can
  lead to the parser r…
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-125
vendor: Red Hat
product: Red Hat Enterprise Linux 6
affected:
  - enterprise_linux 6
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T12:46:43+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89588.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89588.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89588'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532442'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89588'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89588'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89588.mbox
  - url: 'https://git.kernel.org/stable/c/452eb28e03015abec6d4bf6488ee567706ade4e1'
  - url: 'https://git.kernel.org/stable/c/5ff385e9403e87ae33f65b8c38698d3b1e92cfde'
  - url: 'https://git.kernel.org/stable/c/903308ea40adf0577d82eab69882faf8836326ce'
  - url: 'https://git.kernel.org/stable/c/b48b613073c3d652cb1823c15d16f7067cf4cee4'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00182
epssPercentile: 0.0807
scores:
  vendor: 5.1
  cna: 8.4
ingestedAt: '2026-09-14T15:23:07.474Z'
---

## Overview

A flaw was found in the Linux kernel's Advanced Configuration and Power Interface (ACPI) APEI Generic Hardware Error Source (GHES) component. Incorrect length accounting in the `ghes_handle_arm_hw_error()` function can lead to the parser reading beyond the allocated memory section. This out-of-bounds read could potentially result in a denial of service or information disclosure.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89588.json)

**kernel: ACPI: APEI: GHES: fix ARM section length accounting after header** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

Affected:

- Red Hat Enterprise Linux 6

No fix planned:

- Red Hat Enterprise Linux 6

Not affected:

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

## Remediation

Out of support scope