---
id: CVE-2026-98584
title: >-
  kernel: net/sched: fix potential stack infoleak in em_text_dump()
  (CVE-2026-98584)
summary: >-
  A flaw was found in the Linux kernel's network traffic control subsystem. A
  local user can exploit this vulnerability to cause an information disclosure
  of kernel stack data. When dumping text search filter configurations, the
  kernel fails…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cvssSource: vendor
cwe: CWE-908
vendor: Red Hat
product: Red Hat Enterprise Linux 6
affected:
  - enterprise_linux 6
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T04:11:34+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98584.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98584.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98584'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554966'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98584'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98584'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98584.mbox
  - url: 'https://git.kernel.org/stable/c/9923e1c537f91f3530b52d4efce85f3d9c131bf8'
  - url: 'https://git.kernel.org/stable/c/0b160417826d22f24fc31a5b9cfae3b14aa70f76'
  - url: 'https://git.kernel.org/stable/c/9c572a83037a7dcd653ba3a9cc468c16b857d0c9'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00198
epssPercentile: 0.09498
ingestedAt: '2026-10-18T15:45:12.253Z'
---

## Overview

A flaw was found in the Linux kernel's network traffic control subsystem. A local user can exploit this vulnerability to cause an information disclosure of kernel stack data. When dumping text search filter configurations, the kernel fails to initialize a stack structure before copying it into user-space response messages. A local user can query these filter details to view uninitialized kernel memory, potentially exposing sensitive system data.

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98584.json)

**kernel: net/sched: fix potential stack infoleak in em_text_dump()** — rated Low by Red Hat. Released 2026-10-18, updated 2026-10-20.

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