---
id: CVE-2026-98857
title: 'kernel: ipvs: bound LBLCR and LBLC cache growth (CVE-2026-98857)'
summary: >-
  A flaw was found in the Linux kernel's IP Virtual Server (IPVS) module. The
  load-balancing cache fails to enforce strict bounds on table growth when
  entries remain continuously active. A remote attacker can exploit this
  vulnerability by tr…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-770
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: '2026-10-24T06:03:36+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98857.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98857.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98857'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555229'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98857'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98857'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98857.mbox
  - url: 'https://git.kernel.org/stable/c/bc9ff8e64771cc32a216953fe615386f46ac1eaa'
  - url: 'https://git.kernel.org/stable/c/31028d7b970962fbeda1e9131405c76551094300'
  - url: 'https://git.kernel.org/stable/c/6316d17324bd4ca400c26adb7b656c6e3447c209'
  - url: 'https://git.kernel.org/stable/c/16c83c047ecfaf226ad81d45d77fa11a3184d0e4'
  - url: 'https://git.kernel.org/stable/c/2a3c3de660f96865f303fd25f1285f2ffbfd521d'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00156
epssPercentile: 0.04714
ingestedAt: '2026-10-18T16:47:32.461Z'
---

## Overview

A flaw was found in the Linux kernel's IP Virtual Server (IPVS) module. The load-balancing cache fails to enforce strict bounds on table growth when entries remain continuously active. A remote attacker can exploit this vulnerability by transmitting network traffic to unique destination addresses, leading to excessive kernel memory consumption and a Denial of Service (DoS).

## Vendor advisories

- **Red Hat VEX** · Important · 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 10, Red Hat Enterprise Linux 6, 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-2026-98857.json)

**kernel: ipvs: bound LBLCR and LBLC cache growth** — rated Important 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 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

Affected