---
title: "CVE-2026-90172: Linux Kernel smbdirect - Use After Free"
description: "Linux kernel smbdirect contains a use-after-free caused by improper teardown order in smbdirect_accept_connect_request error path, letting attackers cause kernel memory corruption, exploit requires triggering rdma_accept_failed error."
url: https://panop.io/threat-heartbeat/CVE-2026-90172/
---

# CVE-2026-90172 Linux Kernel smbdirect - Use After Free

Linux kernel smbdirect contains a use-after-free caused by improper teardown order in smbdirect\_accept\_connect\_request error path, letting attackers cause kernel memory corruption, exploit requires triggering rdma\_accept\_failed error.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.49% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90172)

## Details

Type

Use After Free

Impact

Denial Of Service

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for smbdirect teardown order.

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-2026-90172](https://nvd.nist.gov/vuln/detail/CVE-2026-90172)
- [https://git.kernel.org/stable/c/383a9480f5f40bc46454cce27ccfad532cedad9c](https://git.kernel.org/stable/c/383a9480f5f40bc46454cce27ccfad532cedad9c)
- [https://git.kernel.org/stable/c/959813a3752b459ed77b0b3eaf30b9f4c6204260](https://git.kernel.org/stable/c/959813a3752b459ed77b0b3eaf30b9f4c6204260)

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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

Panop answers these inside your environment, for this CVE and every other finding.

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