---
id: CVE-2024-42265
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  protect the fetch of ->fd[fd] in do_dup2() from mispredictions

  both callers have verified that fd is not greater than ->max_fds;
  however, misprediction might end up wi…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  protect the fetch of ->fd[fd] in do_dup2() from mispredictions

  both callers have verified that fd is not greater than ->max_fds;
  however, misprediction might end up wi…
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 < 4.19.320
  - 'linux_kernel >= 4.20, < 5.4.282'
  - 'linux_kernel >= 5.5, < 5.10.224'
  - 'linux_kernel >= 5.11, < 5.15.165'
  - 'linux_kernel >= 5.16, < 6.1.104'
  - 'linux_kernel >= 6.2, < 6.6.45'
  - 'linux_kernel >= 6.7, < 6.10.4'
  - linux_kernel = 6.11
patched:
  - linux_kernel 6.10.4
published: '2024-08-17'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:18:44.810'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-42265'
references:
  - url: 'https://git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00279
epssPercentile: 0.20234
ingestedAt: '2026-10-15T03:30:12.731Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-09-10T16:12:30.860612Z'
---

## Overview

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

protect the fetch of ->fd[fd] in do_dup2() from mispredictions

both callers have verified that fd is not greater than ->max_fds;
however, misprediction might end up with
        tofree = fdt->fd[fd];
being speculatively executed.  That's wrong for the same reasons
why it's wrong in close_fd()/file_close_fd_locked(); the same
solution applies - array_index_nospec(fd, fdt->max_fds) could differ
from fd only in case of speculative execution on mispredicted path.

## Affected

- `linux_kernel < 4.19.320`
- `linux_kernel >= 4.20, < 5.4.282`
- `linux_kernel >= 5.5, < 5.10.224`
- `linux_kernel >= 5.11, < 5.15.165`
- `linux_kernel >= 5.16, < 6.1.104`
- `linux_kernel >= 6.2, < 6.6.45`
- `linux_kernel >= 6.7, < 6.10.4`
- `linux_kernel = 6.11`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.10.4`