---
id: CVE-2026-46026
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: qrtr: ns: Limit the maximum number of lookups

  Current code does no bound checking on the number of lookups a client can
  perform
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: qrtr: ns: Limit the maximum number of lookups

  Current code does no bound checking on the number of lookups a client can
  perform. Though the code restricts the loo…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.7, < 6.6.140'
  - 'linux_kernel >= 6.7, < 6.12.86'
  - 'linux_kernel >= 6.13, < 6.18.27'
  - 'linux_kernel >= 6.19, < 7.0.4'
patched:
  - linux_kernel 7.0.4
published: '2026-05-27'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:39.087'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46026'
references:
  - url: 'https://git.kernel.org/stable/c/0dbec101a7076e9b1e4bd1876f7cf07c56ff4ce3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/20855cef7e659ef84ac73251256fa530819b2346'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2b930bc77e00cb27e1d6e1d497b3b596283465ef'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5640227d9a21c6a8be249a10677b832e7f40dc55'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6e3675251fcea06caecc61eb76462467558adfa6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/76adf8f69b0bb3ab20be7c58f5d555027332d113'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/91cb30b6bb1880ba0748ca059bef50b8ac13793d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bd69e0e8a7643ba5385f19f479e8e3da71f8d495'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00128
epssPercentile: 0.02176
ingestedAt: '2026-10-15T03:30:12.881Z'
---

## Overview

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

net: qrtr: ns: Limit the maximum number of lookups

Current code does no bound checking on the number of lookups a client can
perform. Though the code restricts the lookups to local clients, there is
still a possibility of a malicious local client sending a flood of
NEW_LOOKUP messages over the same socket.

Fix this issue by limiting the maximum number of lookups to 64 globally.
Since the nameserver allows only atmost one local observer, this global
lookup count will ensure that the lookups stay within the limit.

Note that, limit of 64 is chosen based on the current platform
requirements. If requirement changes in the future, this limit can be
increased.

## Affected

- `linux_kernel >= 5.7, < 6.6.140`
- `linux_kernel >= 6.7, < 6.12.86`
- `linux_kernel >= 6.13, < 6.18.27`
- `linux_kernel >= 6.19, < 7.0.4`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.4`