---
id: CVE-2026-98572
title: 'kernel: bpf: Fix immediate JMP JEQ/JNE on MIPS32 (CVE-2026-98572)'
summary: >-
  A flaw was found in the Linux kernel's extended Berkeley Packet Filter (eBPF)
  Just-In-Time (JIT) compiler on 32-bit MIPS systems. An instruction generation
  error during 64-bit jump comparisons causes negative numeric constants to be
  incorr…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cvssSource: vendor
cwe: CWE-1025
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 <
    1547e9f3a7d71971216e6dba30270cae13fe4e02
  - >-
    Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 <
    beeae92e70e705e90a0d6d9b3b8498ee3b92f495
  - >-
    Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 <
    6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0
  - >-
    Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 <
    876ef04c75c2751acfd355606fca3eced71dec65
  - >-
    Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 <
    1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8
  - >-
    Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 <
    db762fd96be225bd06161c9631160c755d891693
  - Linux 5.16
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T03:20:21+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98572.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98572.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98572'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554973'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98572'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98572'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98572.mbox
  - url: 'https://git.kernel.org/stable/c/1547e9f3a7d71971216e6dba30270cae13fe4e02'
  - url: 'https://git.kernel.org/stable/c/beeae92e70e705e90a0d6d9b3b8498ee3b92f495'
  - url: 'https://git.kernel.org/stable/c/6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0'
  - url: 'https://git.kernel.org/stable/c/876ef04c75c2751acfd355606fca3eced71dec65'
  - url: 'https://git.kernel.org/stable/c/1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8'
  - url: 'https://git.kernel.org/stable/c/db762fd96be225bd06161c9631160c755d891693'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00211
epssPercentile: 0.11474
ingestedAt: '2026-10-18T15:45:12.257Z'
---

## Overview

A flaw was found in the Linux kernel's extended Berkeley Packet Filter (eBPF) Just-In-Time (JIT) compiler on 32-bit MIPS systems. An instruction generation error during 64-bit jump comparisons causes negative numeric constants to be incorrectly evaluated against a hardware register instead of the intended values. A local user capable of loading BPF programs can exploit this issue to produce invalid comparison results, potentially bypassing security filters or causing unexpected program execution paths.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98572.json)

**kernel: bpf: Fix immediate JMP JEQ/JNE on MIPS32** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.

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.