---
title: "CVE-2026-98174: Linux Kernel smb client - Race Condition"
description: "Linux kernel smb client contains a race condition and missing initialization in TCP_Server_Info.rlist, caused by improper list pointer handling and concurrent access, letting attackers cause list corruption, exploit requires concurrent cifsd threads."
url: https://panop.io/threat-heartbeat/CVE-2026-98174/
---

# CVE-2026-98174 Linux Kernel smb client - Race Condition

Linux kernel smb client contains a race condition and missing initialization in TCP\_Server\_Info.rlist, caused by improper list pointer handling and concurrent access, letting attackers cause list corruption, exploit requires concurrent cifsd threads.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.36% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98174)

## Details

Type

Race Condition

Impact

Denial Of Service

CVSS vector

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

Published

6 October 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-98174](https://nvd.nist.gov/vuln/detail/CVE-2026-98174)
- [https://git.kernel.org/stable/c/04082b1833856cb9ed87e0d3d5f04cbf836cf7da](https://git.kernel.org/stable/c/04082b1833856cb9ed87e0d3d5f04cbf836cf7da)
- [https://git.kernel.org/stable/c/5a8f82f9c5839389cf4036029dd75a9911049e83](https://git.kernel.org/stable/c/5a8f82f9c5839389cf4036029dd75a9911049e83)
- [https://git.kernel.org/stable/c/5f270f091256da1338c3631083e15d7f83cc05e1](https://git.kernel.org/stable/c/5f270f091256da1338c3631083e15d7f83cc05e1)
- [https://git.kernel.org/stable/c/b5f924ffbfa976e4b97f17e8132c595b97482c2d](https://git.kernel.org/stable/c/b5f924ffbfa976e4b97f17e8132c595b97482c2d)
- [https://git.kernel.org/stable/c/c037d6bde3dd5fa00b017b6b98a5389ec0ebc02f](https://git.kernel.org/stable/c/c037d6bde3dd5fa00b017b6b98a5389ec0ebc02f)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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