---
id: CVE-2026-97503
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  genirq/proc: Size interrupt directory names for 10-digit interrupt numbers

  /proc/irq/<n>/ directory names are built in `char name[10]` buffers
  with `sprintf(name, "%u"…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  genirq/proc: Size interrupt directory names for 10-digit interrupt numbers

  /proc/irq/<n>/ directory names are built in `char name[10]` buffers
  with `sprintf(name, "%u"…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    d4b22fbae70037299e96539c330e4a1054b28a91
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c2c7983c93f5d86962318be7e7298f1bc3feb1a6
  - Linux < 6.18.53
  - Linux (all versions)
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T17:17:28.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97503'
references:
  - url: 'https://git.kernel.org/stable/c/c2c7983c93f5d86962318be7e7298f1bc3feb1a6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d4b22fbae70037299e96539c330e4a1054b28a91'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.863Z'
---

## Overview

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

genirq/proc: Size interrupt directory names for 10-digit interrupt numbers

/proc/irq/<n>/ directory names are built in `char name[10]` buffers
with `sprintf(name, "%u", irq)`.

Ten-digit IRQ numbers already need 11 bytes including the trailing NUL, and
current sparse-IRQ configurations allow interrupt numbers in that range.

Size the temporary name buffer for the current decimal form and switch
to bounded formatting when creating or removing the proc entry.

## Remediation

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