CVE-2026-98452Network attack vectorHinoki check available

Handle leakage via failed compound directory opens

Published Oct 18, 2026 · Updated Oct 18, 2026

Resource leakage in the Linux SMB client allows remote attackers to leave server-side directory handles open via compound-response errors. In open_cached_dir(), an error after a successful CREATE discards the file identifiers needed for SMB2_close(), while CREATE responses are used without adequate validation. Exposure requires an established SMB share connection and a cached directory open; the documented consequence is leaked handles, not demonstrated code execution or a system crash.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource leakage in the Linux SMB client allows remote attackers to leave server-side directory handles open via compound-response errors. In open_cached_dir(), an error after a successful CREATE discards the file identifiers needed for SMB2_close(), while CREATE responses are used without adequate validation. Exposure requires an established SMB share connection and a cached directory open; the documented consequence is leaked handles, not demonstrated code execution or a system crash.

The record

CVE
CVE-2026-98452
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 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=5.1
  2. Affected versionversion=b0f6df737a1c5d9d5ff90cc946205d8af46cc067 <48958ddda3d7eee3600261e2d90671f63e055dc4
  3. Affected versionversion=b0f6df737a1c5d9d5ff90cc946205d8af46cc067 <7c1509598a4fdfb54cb09ce33e4405bd6dbd8295
  4. Affected versionversion=b0f6df737a1c5d9d5ff90cc946205d8af46cc067 <abab661eed00fa102d3c35ddf1cce4f687e718c1
  5. Affected versionversion=b0f6df737a1c5d9d5ff90cc946205d8af46cc067 <d2ff5fb93ea83034025850266b5eed391f96b825

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=b0f6df737a1c5d9d5ff90cc946205d8af46cc067 <48958ddda3d7eee3600261e2d90671f63e055dc4; version=b0f6df737a1c5d9d5ff90cc946205d8af46cc067 <7c1509598a4fdfb54cb09ce33e4405bd6dbd8295; version=b0f6df737a1c5d9d5ff90cc946205d8af46cc067 <abab661eed00fa102d3c35ddf1cce4f687e718c1; version=b0f6df737a1c5d9d5ff90cc946205d8af46cc067 <d2ff5fb93ea83034025850266b5eed391f96b825

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
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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