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CVE-2026-98175

smb: client: cancel reconnect work in clean_demultiplex_info()

No known exploitation. EPSS puts it in the 24th percentile. Fixed versions are out.

CVSS 3.17.5HighEPSS percentile24th0.3% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix1 product4 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

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  • LinuxAffected: ≥ 53e0e11efe9289535b060a51d4cf37c25e0d0f2b, < 180380272f116dbd2b0354c5c7872e112e519149Upgrade to: 180380272f116dbd2b0354c5c7872e112e519149Affected: ≥ 53e0e11efe9289535b060a51d4cf37c25e0d0f2b, < e3f6a779433d13aafb5edab59e4f9313051e8a52Upgrade to: e3f6a779433d13aafb5edab59e4f9313051e8a52Affected: ≥ 53e0e11efe9289535b060a51d4cf37c25e0d0f2b, < 7ab9ceedd860216fb97f2d8574cbe58b8906f42aUpgrade to: 7ab9ceedd860216fb97f2d8574cbe58b8906f42aAffected: ≥ 53e0e11efe9289535b060a51d4cf37c25e0d0f2b, < 2e5103e11a17c274715dd56cf185eeedccf686b8Upgrade to: 2e5103e11a17c274715dd56cf185eeedccf686b8 + 17 more branchesStated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

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What it is

From the CVE record

In the Linux kernel, the following vulnerability has been resolved: smb: client: cancel reconnect work in clean_demultiplex_info() clean_demultiplex_info() cancels server->echo delayed work but not server->reconnect, which can cause a use-after-free when the demultiplex thread exits while a reconnect work is still queued: cifs_demultiplex_thread() cifs_readv_from_socket() cifs_reconnect() __cifs_reconnect() cifs_queue_server_reconn() mod_delayed_work(cifsiod_wq, &server->reconnect, 0) clean_demultiplex_info() cancel_delayed_work_sync(&server->echo) // echo canceled // reconnect NOT canceled kfree_sensitive(server) // server freed ...later, on cifsiod_wq: smb2_reconnect_server() server->srv_count // UAF read of freed server Fix this by canceling server->reconnect delayed work in clean_demultiplex_info() before the server is freed, the same way cifs_put_tcp_session() already does.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS24th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.3% chance of exploitation activity in the next 30 days, which ranks it in the 24th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

3 events over 1 day, from the signal feeds we watch.

  1. Record updated
  2. Publishedrecord updated

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Scored 7.5 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction RequiredA user must click a link, open a file, or perform some action

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Sources

References in the record

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In the news

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