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CVE Record

CVE-2023-53603: scsi: qla2xxx: Avoid fcport pointer dereference

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Avoid fcport pointer dereference Klocwork reported warning of NULL pointer may be dereferenced. The routine exits when sa_ctl is NULL and fcport is allocated after the exit call thus causing NULL fcport pointer to dereference at the time of exit. To avoid fcport pointer dereference, exit the routine when sa_ctl is NULL.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel bug in the qla2xxx SCSI driver. An error path could dereference a NULL pointer before a port object is allocated. The source says the issue is resolved, but provides no CVSS score, stated impact, or active exploitation evidence.

Executive priority

Handle through normal kernel patch management unless qla2xxx is used on critical storage-connected systems. The record lacks severity and exploitation evidence, but kernel NULL dereferences can affect availability in exposed code paths.

Technical view

The flaw is a NULL pointer dereference in qla2xxx cleanup/exit handling when sa_ctl is NULL and fcport has not yet been allocated. The fix changes control flow to exit the routine when sa_ctl is NULL, avoiding dereferencing fcport in that state.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions where the qla2xxx SCSI driver code path is present or used. The provided record has no CPEs and lists kernel versions and commits rather than distribution package names.

Exploitation context

The source bundle does not cite public exploitation, KEV listing, exploit code, or a demonstrated attack path. The issue was reported by Klocwork as a NULL pointer dereference warning, so exploitability and real-world trigger conditions are not established here.

Researcher notes

Evidence is thin: no CVSS, CWE, CPE, exploit status, or detailed trigger conditions are provided. Analysis should focus on mapping upstream fix commits to downstream kernels and confirming whether qla2xxx is reachable in the environment.

Mitigation direction

  • Identify systems running the affected Linux kernel versions listed in the CVE record.
  • Check Linux kernel stable updates and your distribution vendor advisories for the qla2xxx fix.
  • Prioritize systems that use the qla2xxx SCSI driver path.
  • Apply the fixed kernel package through normal vendor-supported update channels.
  • Reboot or otherwise activate the updated kernel according to operational policy.

Validation and detection

  • Inventory kernel versions across Linux hosts and compare against the CVE affected list.
  • Check whether the qla2xxx driver is loaded, packaged, or required on each host.
  • Confirm the installed kernel includes one of the referenced stable fix commits or downstream backport.
  • Review vendor advisories because distribution package versions may differ from upstream kernel versions.
Prepared
Confidence
medium
Sources
6

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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ATT&CK lookup starting points

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CVE-2023-53603 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
0ADP providers
5Source 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
LinuxLinux7b2fbfa4b2cd3a24c1760b85d842e928070d4744, e0fb8ce2bb9e52c846e54ad2c58b5b7beb13eb09, e0fb8ce2bb9e52c846e54ad2c58b5b7beb13eb09, e0fb8ce2bb9e52c846e54ad2c58b5b7beb13eb09, 47b583ad1f7e459689eb1bdd222279a6986ccd69, d2deafaef0330a863b5e046c1154b605588d19f7, 5.15.61, 5.18.18, 5.19.2unaffected
LinuxLinux6.0, 0, 5.15.121, 6.1.40, 6.4.5, 6.5affected
Weakness

CWE details

No CWE listed

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