Security readout for executives and security teams
Plain-English summary
CVE-2022-49534 is a Linux kernel memory leak in the lpfc Fibre Channel driver. Under NPIV port login rejection handling, memory may not be freed correctly. The main business risk is availability degradation on affected storage-connected Linux systems, not data theft or tampering.
Executive priority
Treat this as a moderate-priority availability issue for Linux storage infrastructure. Patch during normal kernel maintenance unless exposed storage hosts show memory pressure or vendor guidance raises urgency. It does not currently have source-backed evidence of active exploitation.
Technical view
The issue is CWE-401 in lpfc_ignore_els_cmpl() and lpfc_els_rsp_reject(), where NPIV PLOGI_RJT handling can leak login_mbox and service-parameter ctx_buf allocations. CVSS 3.1 is 5.5, local attack vector, low privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is most likely on Linux systems using the lpfc SCSI/Fibre Channel driver with NPIV-related workflows. Systems without this driver or storage path are less likely exposed. The source bundle lists Linux kernel affected version data but does not provide distribution-specific package names.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation. CVSS indicates local, low-privileged access is required. The described impact is memory exhaustion or availability loss, not confidentiality or integrity compromise.
Researcher notes
The public description is specific to lpfc NPIV PLOGI_RJT cleanup and names the affected functions and allocations. Evidence is incomplete for distribution-level versions and exploitability beyond the CVSS local, low-privilege model, so validation should focus on kernel provenance and driver usage.
Mitigation direction
- Apply kernel updates containing the referenced stable lpfc fixes.
- Check distribution vendor advisories for backported CVE-2022-49534 fixes.
- Prioritize storage hosts using lpfc and NPIV functionality.
- Restrict unnecessary local user access on affected storage-connected hosts.
- Monitor affected systems for memory pressure or availability symptoms.
Validation and detection
- Inventory Linux kernels and compare against vendor fixed package guidance.
- Identify hosts using the lpfc driver and NPIV-related Fibre Channel paths.
- Confirm whether referenced stable commits are present or backported.
- Review monitoring for unexplained memory growth on relevant systems.
- For custom kernels, regression-test lpfc ELS reject error paths.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-401: 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-2022-49534 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/c00df0f34a6d5e14da379f96ea67e501ce67b002CVE reference, Linux
- https://git.kernel.org/stable/c/672d1cb40551ea9c95efad43ab6d45e4ab4e015fCVE 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.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.