---
title: "CVE-2026-98115: Linux kernel ksmbd - Denial of Service"
description: "Linux kernel ksmbd contains a session management vulnerability caused by improper session teardown synchronization in SMB3 multichannel, letting attackers cause resource mismanagement, exploit requires SMB3 multichannel usage."
url: https://panop.io/threat-heartbeat/CVE-2026-98115/
---

# CVE-2026-98115 Linux kernel ksmbd - Denial of Service

Linux kernel ksmbd contains a session management vulnerability caused by improper session teardown synchronization in SMB3 multichannel, letting attackers cause resource mismanagement, exploit requires SMB3 multichannel usage.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.27% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98115)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

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

Published

25 September 2026

Updated

15 October 2026

Weakness

[CWE-362](https://cwe.mitre.org/data/definitions/362.html)

## Vendor fix

Update to the latest Linux kernel version containing the fix.

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-2026-98115](https://nvd.nist.gov/vuln/detail/CVE-2026-98115)
- [https://git.kernel.org/stable/c/a7e6df0bb92642bee4431b2b85c69ada1e463b21](https://git.kernel.org/stable/c/a7e6df0bb92642bee4431b2b85c69ada1e463b21)
- [https://git.kernel.org/stable/c/d12168084c8c1b6d883c8eca5853929ac5136a9e](https://git.kernel.org/stable/c/d12168084c8c1b6d883c8eca5853929ac5136a9e)

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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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