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CVE-2026-98174

smb: client: fix rlist race and missing initialization

No known exploitation. EPSS puts it in the 29th percentile. Fixed versions are out.

CVSS 3.17.5HighEPSS percentile29th0.4% 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: ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b5f924ffbfa976e4b97f17e8132c595b97482c2dUpgrade to: b5f924ffbfa976e4b97f17e8132c595b97482c2dAffected: ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5a8f82f9c5839389cf4036029dd75a9911049e83Upgrade to: 5a8f82f9c5839389cf4036029dd75a9911049e83Affected: ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 04082b1833856cb9ed87e0d3d5f04cbf836cf7daUpgrade to: 04082b1833856cb9ed87e0d3d5f04cbf836cf7daAffected: ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c037d6bde3dd5fa00b017b6b98a5389ec0ebc02fUpgrade to: c037d6bde3dd5fa00b017b6b98a5389ec0ebc02f + 5 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: fix rlist race and missing initialization TCP_Server_Info.rlist is allocated via kzalloc which zeros both ->next and ->prev to NULL instead of pointing to itself, making list_empty() always return false and list_add() dereference a NULL ->prev pointer. Also, cifs_signal_cifsd_for_reconnect() can be called concurrently from multiple cifsd threads, allowing the same server's rlist node to be added twice into the local list, corrupting it.

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.

EPSS29th
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

0.4% chance of exploitation activity in the next 30 days, which ranks it in the 29th 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

And 2 more references. See all after sign-in

In the news

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