---
id: CVE-2026-98434
title: >-
  kernel: sysctl: Check range in  proc_dointvec_ms_jiffies_minmax
  (CVE-2026-98434)
summary: >-
  A flaw was found in the Linux kernel. Due to a missing range validation check
  in the sysctl subsystem, configured minimum and maximum limits were not
  enforced during specific millisecond-to-jiffies conversions. A local user with
  permission…
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-1284
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= d174174c6776a340f5c25aab1ac47a2dd950f380 <
    1c23dba51dbf7e86c7c2e617c964be1411329cb4
  - >-
    Linux >= d174174c6776a340f5c25aab1ac47a2dd950f380 <
    82431877d837a6c2593efd8e66ba28b35a220ca4
  - Linux 7.0
published: '2026-10-18'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T10:46:35+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98434.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98434.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98434'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554821'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98434'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98434'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98434.mbox
  - url: 'https://git.kernel.org/stable/c/1c23dba51dbf7e86c7c2e617c964be1411329cb4'
  - url: 'https://git.kernel.org/stable/c/82431877d837a6c2593efd8e66ba28b35a220ca4'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
ingestedAt: '2026-10-18T15:45:12.310Z'
epss: 0.00145
epssPercentile: 0.03714
---

## Overview

A flaw was found in the Linux kernel. Due to a missing range validation check in the sysctl subsystem, configured minimum and maximum limits were not enforced during specific millisecond-to-jiffies conversions. A local user with permission to modify kernel parameters could provide out-of-bounds values, potentially leading to system instability or a Denial of Service (DoS).

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98434.json)

**kernel: sysctl: Check range in  proc_dointvec_ms_jiffies_minmax** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-19.

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.