CVE-2024-49891

Kernel crash via freed hardware queue pointer

Published Oct 21, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel lpfc driver allows local users to crash the kernel during HBA reset or errata handling. Reset and errata paths can collide with queue cleanup, leaving hdwq pointers freed before lpfc_sli_flush_io_rings(), lpfc_dev_loss_tmo_callbk(), or lpfc_abort_handler() dereferences them. Reachability requires an affected lpfc Fibre Channel HBA and concurrent reset or errata handling; the documented consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel lpfc driver allows local users to crash the kernel during HBA reset or errata handling. Reset and errata paths can collide with queue cleanup, leaving hdwq pointers freed before lpfc_sli_flush_io_rings(), lpfc_dev_loss_tmo_callbk(), or lpfc_abort_handler() dereferences them. Reachability requires an affected lpfc Fibre Channel HBA and concurrent reset or errata handling; the documented consequence is a kernel crash.

The record

CVE
CVE-2024-49891
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE 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=4.11
  2. Affected versionversion=895427bd012ce5814fc9888c7c0ee9de44761833 <232a138bd843d48cb2368f604646d990db7640f3
  3. Affected versionversion=895427bd012ce5814fc9888c7c0ee9de44761833 <2be1d4f11944cd6283cb97268b3e17c4424945ca
  4. Affected versionversion=895427bd012ce5814fc9888c7c0ee9de44761833 <5873aa7f814754085d418848b2089ef406a02dd0
  5. Affected versionversion=895427bd012ce5814fc9888c7c0ee9de44761833 <99a801e2fca39a6f31e543fc3383058a8955896f
  6. Affected versionversion=895427bd012ce5814fc9888c7c0ee9de44761833 <fd665c8dbdb19548965b0ae80c490de00e906366

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=895427bd012ce5814fc9888c7c0ee9de44761833 <232a138bd843d48cb2368f604646d990db7640f3; version=895427bd012ce5814fc9888c7c0ee9de44761833 <2be1d4f11944cd6283cb97268b3e17c4424945ca; version=895427bd012ce5814fc9888c7c0ee9de44761833 <5873aa7f814754085d418848b2089ef406a02dd0; version=895427bd012ce5814fc9888c7c0ee9de44761833 <99a801e2fca39a6f31e543fc3383058a8955896f; version=895427bd012ce5814fc9888c7c0ee9de44761833 <fd665c8dbdb19548965b0ae80c490de00e906366

Published CVSS scores

5.5NVDCVSS: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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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