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CVE Record

CVE-2023-54289: scsi: qedf: Fix NULL dereference in error handling

In the Linux kernel, the following vulnerability has been resolved: scsi: qedf: Fix NULL dereference in error handling Smatch reported: drivers/scsi/qedf/qedf_main.c:3056 qedf_alloc_global_queues() warn: missing unwind goto? At this point in the function, nothing has been allocated so we can return directly. In particular the "qedf->global_queues" have not been allocated so calling qedf_free_global_queues() will lead to a NULL dereference when we check if (!gl[i]) and "gl" is NULL.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2023-54289 is a Linux kernel bug in the qedf SCSI/FCoE driver. During an early error path, the driver can call cleanup code before a queue pointer exists, causing a NULL pointer dereference. The known impact from the bundle is reliability risk, not data theft or remote code execution.

Executive priority

Treat as a targeted kernel reliability issue. It is worth addressing through normal kernel patching, with higher priority for storage hosts using qedf. The source bundle does not justify emergency response absent local exposure evidence.

Technical view

The flaw is in drivers/scsi/qedf/qedf_main.c within qedf_alloc_global_queues(). Smatch identified a missing unwind path: qedf_free_global_queues() may run while qedf->global_queues is NULL, then dereference gl during cleanup. Kernel stable commits change this error handling path.

Likely exposure

Exposure appears limited to Linux systems using affected kernel versions where the qedf driver code is present and reachable. Practical exposure depends on whether qedf is built, loaded, and used with relevant QLogic/Broadcom Fibre Channel over Ethernet storage hardware.

Exploitation context

The bundle does not report active exploitation, KEV listing, CVSS, public exploit code, or a remote attack path. Evidence supports a kernel NULL dereference in an error-handling path, most plausibly causing local reliability impact if reachable.

Researcher notes

The key evidence is a missing early return/unwind decision before global_queues allocation. The CVE data is incomplete on scoring and exploitability. Validate reachability from the driver initialization and error path in the exact downstream kernel build.

Mitigation direction

  • Apply vendor kernel updates containing the referenced stable fixes or backports.
  • Check distribution advisories for fixed package versions and reboot requirements.
  • Disable or avoid loading unused qedf support only if vendor-supported.
  • Prioritize systems using qedf-connected storage over unrelated Linux hosts.

Validation and detection

  • Inventory running kernel versions against the affected version data in the CVE bundle.
  • Check whether the qedf driver is built, installed, or loaded on each host.
  • Confirm vendor kernel changelogs include one of the referenced stable fixes or a backport.
  • Review kernel logs for qedf-related NULL dereference or panic events.
Prepared
Confidence
medium
Sources
9

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

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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
0ADP providers
8Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux61d8658b4a435eac729966cc94cdda077a8df5cd, 61d8658b4a435eac729966cc94cdda077a8df5cd, 61d8658b4a435eac729966cc94cdda077a8df5cd, 61d8658b4a435eac729966cc94cdda077a8df5cd, 61d8658b4a435eac729966cc94cdda077a8df5cd, 61d8658b4a435eac729966cc94cdda077a8df5cd, 61d8658b4a435eac729966cc94cdda077a8df5cdunaffected
LinuxLinux4.11, 0, 5.4.251, 5.10.188, 5.15.121, 6.1.39, 6.3.13, 6.4.4, 6.5affected
Weakness

CWE details

No CWE listed

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