CVE-2023-54260

Kernel memory leak after SMB Direct allocation failure

Published Dec 30, 2025 · Updated Dec 30, 2025

Resource leak in the CIFS SMB Direct client in Linux causes connection data to remain allocated after memory-region allocation fails. The connection is not assigned to server->smbd_conn before smbd_destroy() runs, so its NULL check returns without releasing the allocation. The condition occurs during SMB Direct connection setup when memory-region allocation fails; public sources identify no attacker-controlled trigger or broader impact.

CVSS severityUnavailable
Unscored
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

Resource leak in the CIFS SMB Direct client in Linux causes connection data to remain allocated after memory-region allocation fails. The connection is not assigned to server->smbd_conn before smbd_destroy() runs, so its NULL check returns without releasing the allocation. The condition occurs during SMB Direct connection setup when memory-region allocation fails; public sources identify no attacker-controlled trigger or broader impact.

The record

CVE
CVE-2023-54260
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=4.16
  2. Affected versionversion=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <04b7e13b8a13264282f874db5378fc3d3253cfac
  3. Affected versionversion=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <324c0c34fff1affd436e509325cb46739209704e
  4. Affected versionversion=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <46cd6c639cddba2bd2d810ceb16bb20374ad75b0
  5. Affected versionversion=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <c51ae01104b318bf15f3c5097faba5c72addba7a
  6. Affected versionversion=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <caac205e0d5b44c4c23a10c6c0976d50ebe16ac2
  7. Affected versionversion=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <d303e25887127364a6765eaf7ac68aa2bac518a9
  8. Affected versionversion=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <e9d3401d95d62a9531082cd2453ed42f2740e3fd

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <04b7e13b8a13264282f874db5378fc3d3253cfac; version=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <324c0c34fff1affd436e509325cb46739209704e; version=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <46cd6c639cddba2bd2d810ceb16bb20374ad75b0; version=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <c51ae01104b318bf15f3c5097faba5c72addba7a; version=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <caac205e0d5b44c4c23a10c6c0976d50ebe16ac2; version=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <d303e25887127364a6765eaf7ac68aa2bac518a9; version=c7398583340a6d82b8bb7f7f21edcde27dc6a898 <e9d3401d95d62a9531082cd2453ed42f2740e3fd

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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