---
id: CVE-2026-89964
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  parisc: eisa: Fix infinite loop when parsing invalid IRQ value

  When an invalid value is passed via the "eisa_irq_edge=" kernel
  command line parameter (e.g
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  parisc: eisa: Fix infinite loop when parsing invalid IRQ value

  When an invalid value is passed via the "eisa_irq_edge=" kernel
  command line parameter (e.g. "eisa_irq_e…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    68659b627770f3c8d8f578e8ddee78a07d5f1d0e
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    8640ade22369e248f77fbdd31a9d71b338499eef
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    21f063e3c2b11fb9078ccdfd3b23634313ce4f0c
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    62d88e93ef5e1e04041e347945f7d7510eba1797
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    bb10d54b74845eb4547baa1b9e908ecd32aa64e1
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    3e2691eeee83a819125dba3f42c74e1b6730d5cd
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    16a62a3f2128b3d86fefc082d8f631becd02bff5
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    8b585431a16cfb9d8f2955a9fa0787ce3dceb3c2
  - Linux < 5.10.270
  - Linux < 5.15.221
  - Linux < 6.1.188
  - Linux < 6.6.157
  - Linux < 6.12.110
  - Linux < 6.18.51
  - Linux < 7.2.5
  - Linux (all versions)
published: '2026-09-16'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T10:17:05.227'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89964'
references:
  - url: 'https://git.kernel.org/stable/c/16a62a3f2128b3d86fefc082d8f631becd02bff5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/21f063e3c2b11fb9078ccdfd3b23634313ce4f0c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3e2691eeee83a819125dba3f42c74e1b6730d5cd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/62d88e93ef5e1e04041e347945f7d7510eba1797'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/68659b627770f3c8d8f578e8ddee78a07d5f1d0e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8640ade22369e248f77fbdd31a9d71b338499eef'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8b585431a16cfb9d8f2955a9fa0787ce3dceb3c2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bb10d54b74845eb4547baa1b9e908ecd32aa64e1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.958Z'
epss: 0.0021
epssPercentile: 0.11543
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

parisc: eisa: Fix infinite loop when parsing invalid IRQ value

When an invalid value is passed via the "eisa_irq_edge=" kernel
command line parameter (e.g. "eisa_irq_edge=16,5"), eisa_irq_setup()
prints an error message and continues without advancing the current
position.  As a result the same invalid value is parsed again and
again, causing an infinite loop while the kernel boots.

Advance to the next comma-separated entry, or stop parsing when there
is no next entry, before continuing so that the remaining entries are
processed normally.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.