CVE-2022-49521

Service interruption via unhandled Fibre Channel frames

Published Feb 26, 2025 · Updated May 11, 2026

Resource exhaustion in the lpfc SCSI driver in affected Linux kernels allows local users to interrupt service via unhandled Fibre Channel frames. When lpfc_complete_unsol_iocb() finds no matching rctl handler, lpfc_sli4_send_seq_to_ulp() drops the received frame without returning its resources. Exploitation requires low-privileged local access and an active lpfc Fibre Channel path; the documented consequence is availability loss from resource exhaustion.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the lpfc SCSI driver in affected Linux kernels allows local users to interrupt service via unhandled Fibre Channel frames. When lpfc_complete_unsol_iocb() finds no matching rctl handler, lpfc_sli4_send_seq_to_ulp() drops the received frame without returning its resources. Exploitation requires low-privileged local access and an active lpfc Fibre Channel path; the documented consequence is availability loss from resource exhaustion.

The record

CVE
CVE-2022-49521
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.31
  2. Affected versionversion=4f774513f7b3fe96648b8936f60f835e6ceaa88e <08709769ff2fb6c5ffedcda3742700d8ea1618a8
  3. Affected versionversion=4f774513f7b3fe96648b8936f60f835e6ceaa88e <40cf4ea4d2d497f7732c87d350ba5c3f5e8a43a1
  4. Affected versionversion=4f774513f7b3fe96648b8936f60f835e6ceaa88e <646db1a560f44236b7278b822ca99a1d3b6ea72c
  5. Affected versionversion=4f774513f7b3fe96648b8936f60f835e6ceaa88e <7860d8f8082605b57596aa82d3d438c1fdad9a9e
  6. Affected versionversion=4f774513f7b3fe96648b8936f60f835e6ceaa88e <fa1b509d41c5433672f72c0615cf4aefa0611c99

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.31; version=4f774513f7b3fe96648b8936f60f835e6ceaa88e <08709769ff2fb6c5ffedcda3742700d8ea1618a8; version=4f774513f7b3fe96648b8936f60f835e6ceaa88e <40cf4ea4d2d497f7732c87d350ba5c3f5e8a43a1; version=4f774513f7b3fe96648b8936f60f835e6ceaa88e <646db1a560f44236b7278b822ca99a1d3b6ea72c; version=4f774513f7b3fe96648b8936f60f835e6ceaa88e <7860d8f8082605b57596aa82d3d438c1fdad9a9e; version=4f774513f7b3fe96648b8936f60f835e6ceaa88e <fa1b509d41c5433672f72c0615cf4aefa0611c99

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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