---
id: CVE-2024-58093
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  PCI/ASPM: Fix link state exit during switch upstream function removal

  Before 456d8aa37d0f ("PCI/ASPM: Disable ASPM on MFD function removal to
  avoid use-after-free"), w…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  PCI/ASPM: Fix link state exit during switch upstream function removal

  Before 456d8aa37d0f ("PCI/ASPM: Disable ASPM on MFD function removal to
  avoid use-after-free"), w…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.4.251, < 5.5'
  - 'linux_kernel >= 5.10.188, < 5.11'
  - 'linux_kernel >= 5.15.121, < 5.16'
  - 'linux_kernel >= 6.1.39, < 6.2'
  - 'linux_kernel >= 6.3.13, < 6.4'
  - 'linux_kernel >= 6.4.4, < 6.15'
patched:
  - linux_kernel 6.15
published: '2025-04-16'
updated: '2026-07-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-58093'
references:
  - url: 'https://git.kernel.org/stable/c/0a0f9aecf66b98959aab7fb5764b4b3e522f4f5b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4d96930239981f312821a4065db8cc0f8240a173'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/62db339ecc3d58d8fd83a9e4d80061cd943bb6e2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8b930ddc2044e36866c41423e89889e0258695a3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ba4cdc14c0d4df00d3e99bff7fe545303db98183'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cbf937dcadfd571a434f8074d057b32cd14fbea5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cd4b07507794f7ad1a74e12eca75121d98187e66'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e5cd58f61e9d8024ee11bd78c12c8916891d4077'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f556b6ba0ac5f8353287ce6ed761228f0b4fafb7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00232
epssPercentile: 0.12549
ingestedAt: '2026-07-16T12:53:55.555Z'
---

## Overview

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

PCI/ASPM: Fix link state exit during switch upstream function removal

Before 456d8aa37d0f ("PCI/ASPM: Disable ASPM on MFD function removal to
avoid use-after-free"), we would free the ASPM link only after the last
function on the bus pertaining to the given link was removed.

That was too late. If function 0 is removed before sibling function,
link->downstream would point to free'd memory after.

After above change, we freed the ASPM parent link state upon any function
removal on the bus pertaining to a given link.

That is too early. If the link is to a PCIe switch with MFD on the upstream
port, then removing functions other than 0 first would free a link which
still remains parent_link to the remaining downstream ports.

The resulting GPFs are especially frequent during hot-unplug, because
pciehp removes devices on the link bus in reverse order.

On that switch, function 0 is the virtual P2P bridge to the internal bus.
Free exactly when function 0 is removed -- before the parent link is
obsolete, but after all subordinate links are gone.

[kwilczynski: commit log]

## Affected

- `linux_kernel >= 5.4.251, < 5.5`
- `linux_kernel >= 5.10.188, < 5.11`
- `linux_kernel >= 5.15.121, < 5.16`
- `linux_kernel >= 6.1.39, < 6.2`
- `linux_kernel >= 6.3.13, < 6.4`
- `linux_kernel >= 6.4.4, < 6.15`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.15`