CVE-2026-98162Network attack vector

Resource exhaustion via leaked tree connections

Published Sep 25, 2026 · Updated Sep 25, 2026

Resource leak in Linux ksmbd allows attackers to retain a tree connection when response-buffer pinning fails during SMB2 TREE_CONNECT. smb2_tree_connect registers the new object and increments connection and share counters before ksmbd_iov_pin_rsp runs, but its failure path omits disconnection. The path requires an established SMB session and a response-buffer allocation failure; repeated hits consume server connection resources.

CVSS severityUnavailable
Unscored
EPSS probability0.11%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in Linux ksmbd allows attackers to retain a tree connection when response-buffer pinning fails during SMB2 TREE_CONNECT. smb2_tree_connect registers the new object and increments connection and share counters before ksmbd_iov_pin_rsp runs, but its failure path omits disconnection. The path requires an established SMB session and a response-buffer allocation failure; repeated hits consume server connection resources.

The record

CVE
CVE-2026-98162
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.15.145 <5.16
  2. Affected versionversion=6.1.71 <6.2
  3. Affected versionversion=6.6
  4. Affected versionversion=9f297df20d93411c0b4ddad7f88ba04a7cd36e77
  5. Affected versionversion=e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d <39f2032096715daae5f6fd0f587ca7a474b019df
  6. Affected versionversion=e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d <a6c88e5e3a75f1e4a98ad4bc4037465ccd7925bc
  7. Affected versionversion=f2283680a80571ca82d710bc6ecd8f8beac67d63

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15.145 <5.16; version=6.1.71 <6.2; version=6.6; version=9f297df20d93411c0b4ddad7f88ba04a7cd36e77; version=e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d <39f2032096715daae5f6fd0f587ca7a474b019df; version=e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d <a6c88e5e3a75f1e4a98ad4bc4037465ccd7925bc; version=f2283680a80571ca82d710bc6ecd8f8beac67d63

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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