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CVE Record

CVE-2024-43875: PCI: endpoint: Clean up error handling in vpci_scan_bus()

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: Clean up error handling in vpci_scan_bus() Smatch complains about inconsistent NULL checking in vpci_scan_bus(): drivers/pci/endpoint/functions/pci-epf-vntb.c:1024 vpci_scan_bus() error: we previously assumed 'vpci_bus' could be null (see line 1021) Instead of printing an error message and then crashing we should return an error code and clean up. Also the NULL check is reversed so it prints an error for success instead of failure.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel flaw in PCI endpoint virtual NTB handling. Under an error path, the kernel could crash instead of returning cleanly. The source bundle provides no CVSS score and no evidence of active exploitation, so urgency depends on whether affected systems use PCI endpoint functionality.

Executive priority

Treat as a targeted kernel reliability issue, not a broad emergency. Patch through normal kernel maintenance, with faster action for products or environments relying on PCI endpoint capabilities.

Technical view

The issue is in vpci_scan_bus() in drivers/pci/endpoint/functions/pci-epf-vntb.c. Error handling inconsistently treated vpci_bus as nullable, and a reversed NULL check could log success as failure and then crash. Kernel stable commits address cleanup and error-code return behavior.

Likely exposure

Exposure appears limited to Linux systems running affected kernel builds with PCI endpoint vNTB functionality present or reachable. Typical servers may not exercise this path, but embedded, appliance, virtualization, or hardware-development environments using PCI endpoint features should prioritize review.

Exploitation context

The provided sources do not show public exploitation, exploit code, or CISA KEV listing. The described impact is a kernel crash on an error path, suggesting availability risk rather than confirmed privilege escalation or remote compromise.

Researcher notes

The evidence supports a NULL-handling bug fixed upstream and backported to stable branches. Exact affected version boundaries are not fully clear from the bundle, so researchers should confirm against the CVE record, stable commits, and distribution package metadata.

Mitigation direction

  • Apply vendor kernel updates containing the referenced stable fixes.
  • Prioritize Debian LTS systems covered by the cited advisory.
  • Check distribution advisories for exact package versions and reboot requirements.
  • Reduce exposure of PCI endpoint features where not operationally required.

Validation and detection

  • Inventory Linux kernel versions across affected hardware and appliances.
  • Identify systems using pci-epf-vntb or PCI endpoint functions.
  • Confirm installed kernels include the relevant stable backport or vendor fix.
  • Review crash logs for PCI endpoint or vNTB-related kernel faults.
Prepared
Confidence
medium
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-43875 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
7Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxe2b6ef72b7aea9d7d480d2df499bcd1c93247abb, e35f56bb03304abc92c928b641af41ca372966bb, e35f56bb03304abc92c928b641af41ca372966bb, e35f56bb03304abc92c928b641af41ca372966bb, e35f56bb03304abc92c928b641af41ca372966bb, 5.15.153unaffected
LinuxLinux6.0, 0, 5.15.165, 6.1.103, 6.6.44, 6.10.3, 6.11affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.