Security readout for executives and security teams
Plain-English summary
This is a Linux kernel availability bug in the lpfc SCSI driver. A local low-privileged actor could trigger a NULL pointer dereference and crash affected systems. The sourced impact is service disruption, not data theft or tampering.
Executive priority
Treat as a moderate operational resilience issue. Prioritize storage-dependent Linux servers where local users or workloads exist, because the documented impact is system availability loss rather than data compromise.
Technical view
Calls to starget_to_rport() in the Linux scsi/lpfc path may return NULL. Vulnerable code dereferenced the returned rport without checking. The resolved kernel change adds a NULL check before dereference. CVSS 3.1 is 5.5 with local access, low privileges, and high availability impact.
Likely exposure
Exposure is most relevant to Linux systems running affected kernel versions with the lpfc SCSI driver path present. The bundle identifies Linux 5.18, 5.18.4, and 5.19-related affected version data, but exact downstream distribution status requires vendor confirmation.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV. The CVSS vector requires local access and low privileges, with no user interaction. Evidence supports denial of service rather than confidentiality or integrity compromise.
Researcher notes
This is CWE-476, a NULL pointer dereference. The key code-level fact is that starget_to_rport() can return NULL and rport was dereferenced afterward. The source bundle does not provide exploit details, affected distro matrices, or workaround guidance beyond the stable fixes.
Mitigation direction
- Apply vendor kernel updates that include the referenced stable fixes.
- Prioritize systems using lpfc-backed SCSI or Fibre Channel storage paths.
- Confirm downstream distribution advisories before declaring systems fixed.
- Limit unnecessary local user access on affected Linux hosts.
Validation and detection
- Inventory Linux kernel versions across storage-connected hosts.
- Check whether lpfc is present or loaded on candidate systems.
- Verify installed kernels include the referenced stable commits or distro backports.
- Run existing regression tests for storage availability after updating.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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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CWE-476: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-49332 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/68fcff1127e4995ddbd4b6861892a25c23db3f70CVE reference, Linux
- https://git.kernel.org/stable/c/6f808bd78e8296b4ded813b7182988d57e1f6176CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.