CVE-2024-43816

System crash via byte-swapped FCP copy length

Published Aug 17, 2024 · Updated Aug 5, 2026

Out-of-bounds memory access in Linux kernel 6.10 through 6.10.2 allows local users to crash big-endian systems via zoned FCP I/O. In lpfc_prep_embed_io, memcpy treats the little-endian sgl->sge_len field as a native length, producing an oversized copy on big-endian hosts. The path requires an lpfc-managed Fibre Channel LUN with an embed-capable SLI4 adapter and zoned FCP commands; triggering it can panic the host.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds memory access in Linux kernel 6.10 through 6.10.2 allows local users to crash big-endian systems via zoned FCP I/O. In lpfc_prep_embed_io, memcpy treats the little-endian sgl->sge_len field as a native length, producing an oversized copy on big-endian hosts. The path requires an lpfc-managed Fibre Channel LUN with an embed-capable SLI4 adapter and zoned FCP commands; triggering it can panic the host.

The record

CVE
CVE-2024-43816
Published
Aug 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=6.10
  2. Affected versionversion=af20bb73ac2591631d504f3f859f073bcdb7e11e <8bc7c617642db6d8d20ee671fb6c4513017e7a7e
  3. Affected versionversion=af20bb73ac2591631d504f3f859f073bcdb7e11e <9fd003f344d502f65252963169df3dd237054e49

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.10; version=af20bb73ac2591631d504f3f859f073bcdb7e11e <8bc7c617642db6d8d20ee671fb6c4513017e7a7e; version=af20bb73ac2591631d504f3f859f073bcdb7e11e <9fd003f344d502f65252963169df3dd237054e49

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux Kernel CVE TeamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

T1499.004Application or System Exploitation

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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