---
id: CVE-2026-98752
title: 'kernel: tty: port: fix tty_port_tty_vhangup() race (CVE-2026-98752)'
summary: >-
  A flaw was found in the Linux kernel's TTY (terminal) subsystem. This
  vulnerability allows a local user to cause a Denial of Service (DoS) or
  potentially execute arbitrary code. A race condition during port disconnect
  and hangup routines a…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-366
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T03:43:05+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98752.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98752.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98752'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555122'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98752'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98752'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98752.mbox
  - url: 'https://git.kernel.org/stable/c/ce220b4cdf62f73db0c1940f968eb33b9899fdd0'
  - url: 'https://git.kernel.org/stable/c/6d1a984afc3ca477dab3e51ec806671d443ad524'
  - url: 'https://git.kernel.org/stable/c/6b7be3b9b857947e9c1338d4919d4ebd3b75e907'
  - url: 'https://git.kernel.org/stable/c/017b18addbe8dcace1a569a00d40ed1ba1e03f4c'
  - url: 'https://git.kernel.org/stable/c/b48820de8c1a596c5b99775524dfce73c6576c5d'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00168
epssPercentile: 0.05986
ingestedAt: '2026-10-18T16:47:32.498Z'
---

## Overview

A flaw was found in the Linux kernel's TTY (terminal) subsystem. This vulnerability allows a local user to cause a Denial of Service (DoS) or potentially execute arbitrary code. A race condition during port disconnect and hangup routines allows the kernel to release resources while they are still being accessed, resulting in memory corruption and system crashes.

## Vendor advisories

- **Red Hat VEX** · Moderate · 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 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98752.json)

**kernel: tty: port: fix tty_port_tty_vhangup() race** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.

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

No fix planned:

- 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

Not affected:

- Red Hat Enterprise Linux 6

## Remediation

Fix deferred