CVE-2026-98115Network attack vector

Unspecified impact via premature ksmbd session teardown

Published Sep 25, 2026 · Updated Sep 25, 2026

Race condition in Linux ksmbd allows remote authenticated users to cause unspecified impact during SMB3 multichannel logoff. Session teardown frees shared session objects without first draining requests running on every bound channel, while deferred locks and synchronous CANCEL operations can remain pending without the required wakeup callback. The path requires an authenticated SMB3 multichannel session with a request still active during LOGOFF; the CNA does not specify the resulting security impact.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Linux ksmbd allows remote authenticated users to cause unspecified impact during SMB3 multichannel logoff. Session teardown frees shared session objects without first draining requests running on every bound channel, while deferred locks and synchronous CANCEL operations can remain pending without the required wakeup callback. The path requires an authenticated SMB3 multichannel session with a request still active during LOGOFF; the CNA does not specify the resulting security impact.

The record

CVE
CVE-2026-98115
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=118fd997612d1efc94a86c307c6c6d659ebe29fc
  2. Affected versionversion=6.10.7 <6.11
  3. Affected versionversion=6.11
  4. Affected versionversion=6.6.48 <6.7
  5. Affected versionversion=76e98a158b207771a6c9a0de0a60522a446a3447 <a7e6df0bb92642bee4431b2b85c69ada1e463b21
  6. Affected versionversion=76e98a158b207771a6c9a0de0a60522a446a3447 <d12168084c8c1b6d883c8eca5853929ac5136a9e
  7. Affected versionversion=c1e55020534c4aafbc38d8f5c4583ff30755ac18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=118fd997612d1efc94a86c307c6c6d659ebe29fc; version=6.10.7 <6.11; version=6.11; version=6.6.48 <6.7; version=76e98a158b207771a6c9a0de0a60522a446a3447 <a7e6df0bb92642bee4431b2b85c69ada1e463b21; version=76e98a158b207771a6c9a0de0a60522a446a3447 <d12168084c8c1b6d883c8eca5853929ac5136a9e; version=c1e55020534c4aafbc38d8f5c4583ff30755ac18

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
Privilegesauthenticated
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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