CVE-2024-43875

System crash via unchecked vpci_bus dereference

Published Aug 21, 2024 · Updated May 23, 2026

NULL pointer dereference in Linux PCI endpoint VNTB code allows local users to crash the kernel during virtual PCI bus setup. When pci_scan_bus() returns NULL, vpci_scan_bus() logs the failure but continues with the invalid vpci_bus pointer instead of returning and cleaning up. Low-privilege local access and use of the PCI endpoint VNTB function are required; the documented consequence is a kernel crash only.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux PCI endpoint VNTB code allows local users to crash the kernel during virtual PCI bus setup. When pci_scan_bus() returns NULL, vpci_scan_bus() logs the failure but continues with the invalid vpci_bus pointer instead of returning and cleaning up. Low-privilege local access and use of the PCI endpoint VNTB function are required; the documented consequence is a kernel crash only.

The record

CVE
CVE-2024-43875
Published
Aug 21, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=5.15.153 <5.15.165
  2. Affected versionversion=6.0
  3. Affected versionversion=e2b6ef72b7aea9d7d480d2df499bcd1c93247abb <24414c842a24d0fd498f9db6d2a762a8dddf1832
  4. Affected versionversion=e35f56bb03304abc92c928b641af41ca372966bb <0e27e2e8697b8ce96cdef43f135426525d9d1f8f
  5. Affected versionversion=e35f56bb03304abc92c928b641af41ca372966bb <7d368de78b60088ec9031c60c88976c0063ea4c0
  6. Affected versionversion=e35f56bb03304abc92c928b641af41ca372966bb <8e0f5a96c534f781e8c57ca30459448b3bfe5429
  7. Affected versionversion=e35f56bb03304abc92c928b641af41ca372966bb <b9e8695246bcfc028341470cbf92630cdc1ba36b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15.153 <5.15.165; version=6.0; version=e2b6ef72b7aea9d7d480d2df499bcd1c93247abb <24414c842a24d0fd498f9db6d2a762a8dddf1832; version=e35f56bb03304abc92c928b641af41ca372966bb <0e27e2e8697b8ce96cdef43f135426525d9d1f8f; version=e35f56bb03304abc92c928b641af41ca372966bb <7d368de78b60088ec9031c60c88976c0063ea4c0; version=e35f56bb03304abc92c928b641af41ca372966bb <8e0f5a96c534f781e8c57ca30459448b3bfe5429; version=e35f56bb03304abc92c928b641af41ca372966bb <b9e8695246bcfc028341470cbf92630cdc1ba36b

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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

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Your stack

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