---
id: CVE-2026-98495
title: 'net: arp: terminate device name before lookup'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: arp: terminate device name before lookup

  The ARP ioctl copies a user-provided struct arpreq into a stack object. Its
  arp_dev field may contain IFNAMSIZ bytes with…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc <
    ae6d704dbf9542b0a0830ec91a2db4f30307e7d8
  - >-
    Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc <
    47107491b48ceef0a2faa7a010cfa961f211ef9f
  - >-
    Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc <
    7389757d88f54237951d7497d9c4dae7cc6d64be
  - >-
    Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc <
    1b08c5c3ac27c9ff91c5309f4a32b4e91ce2263b
  - >-
    Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc <
    414bbad9928598904313299ac9e037a73f520be1
  - >-
    Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc <
    ba664d83638640cf454b65167339cbf20dfd6f10
  - >-
    Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc <
    35e716a70733472ede300540082d64c33bf3b4c9
  - >-
    Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc <
    d8b6529e80bcb4fb8177121404cbb3377acaebd2
  - Linux 5.5
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:16:24.810Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98495'
references:
  - url: 'https://git.kernel.org/stable/c/ae6d704dbf9542b0a0830ec91a2db4f30307e7d8'
  - url: 'https://git.kernel.org/stable/c/47107491b48ceef0a2faa7a010cfa961f211ef9f'
  - url: 'https://git.kernel.org/stable/c/7389757d88f54237951d7497d9c4dae7cc6d64be'
  - url: 'https://git.kernel.org/stable/c/1b08c5c3ac27c9ff91c5309f4a32b4e91ce2263b'
  - url: 'https://git.kernel.org/stable/c/414bbad9928598904313299ac9e037a73f520be1'
  - url: 'https://git.kernel.org/stable/c/ba664d83638640cf454b65167339cbf20dfd6f10'
  - url: 'https://git.kernel.org/stable/c/35e716a70733472ede300540082d64c33bf3b4c9'
  - url: 'https://git.kernel.org/stable/c/d8b6529e80bcb4fb8177121404cbb3377acaebd2'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.290Z'
---

## Overview

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

net: arp: terminate device name before lookup

The ARP ioctl copies a user-provided struct arpreq into a stack object. Its
arp_dev field may contain IFNAMSIZ bytes without a NUL terminator.

Such input is passed to dev_get_by_name_rcu() or __dev_get_by_name(), where
strcmp() can read past the end of the stack object when a matching
alternative interface name exists.

Terminate the field before the lookup to prevent the out-of-bounds read.

## Affected

- `Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc < ae6d704dbf9542b0a0830ec91a2db4f30307e7d8`
- `Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc < 47107491b48ceef0a2faa7a010cfa961f211ef9f`
- `Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc < 7389757d88f54237951d7497d9c4dae7cc6d64be`
- `Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc < 1b08c5c3ac27c9ff91c5309f4a32b4e91ce2263b`
- `Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc < 414bbad9928598904313299ac9e037a73f520be1`
- `Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc < ba664d83638640cf454b65167339cbf20dfd6f10`
- `Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc < 35e716a70733472ede300540082d64c33bf3b4c9`
- `Linux >= 36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc < d8b6529e80bcb4fb8177121404cbb3377acaebd2`
- `Linux 5.5`

## Remediation

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