---
id: CVE-2026-89556
title: 'kernel: module: validate string table section types (CVE-2026-89556)'
summary: >-
  A flaw was found in the Linux kernel. This vulnerability arises from
  insufficient validation of string table section types within ELF (Executable
  and Linkable Format) files. A local attacker could exploit this by providing a
  specially craf…
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: Linux
affected:
  - >-
    Linux >= c92aab819d56d51631f0484ed7af11d9d8ff4cb0 <
    50d0aa7d25ba4bc3606f150cd69755068e79f97f
  - >-
    Linux >= c92aab819d56d51631f0484ed7af11d9d8ff4cb0 <
    e4496dda2c6d0acf7ba5fbce14a2723a8935ceee
  - >-
    Linux >= c92aab819d56d51631f0484ed7af11d9d8ff4cb0 <
    9a5ff45689329835f874cefe5174e577d141d423
  - Linux 6.13
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T12:24:14+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89556.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89556.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89556'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532494'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89556'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89556'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89556.mbox
  - url: 'https://git.kernel.org/stable/c/50d0aa7d25ba4bc3606f150cd69755068e79f97f'
  - url: 'https://git.kernel.org/stable/c/e4496dda2c6d0acf7ba5fbce14a2723a8935ceee'
  - url: 'https://git.kernel.org/stable/c/9a5ff45689329835f874cefe5174e577d141d423'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00206
epssPercentile: 0.09515
ingestedAt: '2026-09-14T15:23:07.476Z'
---

## Overview

A flaw was found in the Linux kernel. This vulnerability arises from insufficient validation of string table section types within ELF (Executable and Linkable Format) files. A local attacker could exploit this by providing a specially crafted ELF module, leading to the kernel attempting to access memory outside of its allocated boundaries. This out-of-bounds memory access could result in system instability, causing a denial of service, or potentially lead to the disclosure of sensitive information.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89556.json)

**kernel: module: validate string table section types** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

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.