---
id: CVE-2026-98850
title: 'kernel: net/packet: prevent TX_RING byte count overflow (CVE-2026-98850)'
summary: >-
  A flaw was found in the Linux kernel's packet socket implementation. An
  integer overflow occurs in the transmission ring buffer when calculating the
  total byte count of transmitted frames during a send operation. A local user
  with raw netw…
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-190
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T08:09:04+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98850.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98850.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98850'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555213'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98850'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98850'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98850.mbox
  - url: 'https://git.kernel.org/stable/c/ae169d318d5d23bac76ece90a7e2b5cb760ed043'
  - url: 'https://git.kernel.org/stable/c/be12b221c0301111eeb023be04add3c6ad7c21fe'
  - url: 'https://git.kernel.org/stable/c/69ca64bbb528898916f309552053c32a04a36ebc'
  - url: 'https://git.kernel.org/stable/c/9fd63d284e251332f4874ef9023cde472f315f86'
  - url: 'https://git.kernel.org/stable/c/2cf81fc9505b148b1b70068303ea6ea4b1212403'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00157
epssPercentile: 0.04764
ingestedAt: '2026-10-18T16:47:32.464Z'
---

## Overview

A flaw was found in the Linux kernel's packet socket implementation. An integer overflow occurs in the transmission ring buffer when calculating the total byte count of transmitted frames during a send operation. A local user with raw network privileges can exploit this issue to trigger an internal kernel error, leading to a system crash and resulting in a Denial of Service (DoS).

## Vendor advisories

- **Red Hat VEX** · Moderate · 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 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98850.json)

**kernel: net/packet: prevent TX_RING byte count overflow** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-24.

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

No fix planned:

- Red Hat Enterprise Linux 6
- 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