CVE-2024-53194

Kernel crash via unreferenced PCI bus pointer

Published Dec 27, 2024 · Updated May 11, 2026

Use-after-free in Linux PCI hot removal allows local users to crash the kernel by racing PCIe hotplug driver binding. pci_create_slot() stores slot->bus without acquiring a pci_bus reference, so pci_slot_release() can dereference the bus after removal frees it. Reachability requires a PCIe hot-remove sequence, observed with a USB4 dock, and a race between hierarchy removal and pciehp binding.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in Linux PCI hot removal allows local users to crash the kernel by racing PCIe hotplug driver binding. pci_create_slot() stores slot->bus without acquiring a pci_bus reference, so pci_slot_release() can dereference the bus after removal frees it. Reachability requires a PCIe hot-remove sequence, observed with a USB4 dock, and a race between hierarchy removal and pciehp binding.

The record

CVE
CVE-2024-53194
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.27
  2. Affected versionversion=f46753c5e354b857b20ab8e0fe7b2579831dc369 <20502f0b3f3acd6bee300257556c27a867f80c8b
  3. Affected versionversion=f46753c5e354b857b20ab8e0fe7b2579831dc369 <41bbb1eb996be1435815aa1fbcc9ffc45b84cc12
  4. Affected versionversion=f46753c5e354b857b20ab8e0fe7b2579831dc369 <50473dd3b2a08601a078f852ea05572de9b1f86c
  5. Affected versionversion=f46753c5e354b857b20ab8e0fe7b2579831dc369 <69d2ceac11acf8579d58d55c9c5b65fb658f916e
  6. Affected versionversion=f46753c5e354b857b20ab8e0fe7b2579831dc369 <c7acef99642b763ba585f4a43af999fcdbcc3dc4
  7. Affected versionversion=f46753c5e354b857b20ab8e0fe7b2579831dc369 <c8266ab8e7ccd1d1f5a9c8b29eb2020175048134
  8. Affected versionversion=f46753c5e354b857b20ab8e0fe7b2579831dc369 <d0ddd2c92b75a19a37c887154223372b600fed37
  9. Affected versionversion=f46753c5e354b857b20ab8e0fe7b2579831dc369 <da6e6ff1f6c57f16e07af955e0e997fc90dd1e75
  10. Affected versionversion=f46753c5e354b857b20ab8e0fe7b2579831dc369 <e5d5c04aac71bf1476dc44b56f2206a4c2facca8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.27; version=f46753c5e354b857b20ab8e0fe7b2579831dc369 <20502f0b3f3acd6bee300257556c27a867f80c8b; version=f46753c5e354b857b20ab8e0fe7b2579831dc369 <41bbb1eb996be1435815aa1fbcc9ffc45b84cc12; version=f46753c5e354b857b20ab8e0fe7b2579831dc369 <50473dd3b2a08601a078f852ea05572de9b1f86c; version=f46753c5e354b857b20ab8e0fe7b2579831dc369 <69d2ceac11acf8579d58d55c9c5b65fb658f916e; version=f46753c5e354b857b20ab8e0fe7b2579831dc369 <c7acef99642b763ba585f4a43af999fcdbcc3dc4; version=f46753c5e354b857b20ab8e0fe7b2579831dc369 <c8266ab8e7ccd1d1f5a9c8b29eb2020175048134; version=f46753c5e354b857b20ab8e0fe7b2579831dc369 <d0ddd2c92b75a19a37c887154223372b600fed37; version=f46753c5e354b857b20ab8e0fe7b2579831dc369 <da6e6ff1f6c57f16e07af955e0e997fc90dd1e75; version=f46753c5e354b857b20ab8e0fe7b2579831dc369 <e5d5c04aac71bf1476dc44b56f2206a4c2facca8

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8CVE.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo