---
title: "CVE-2026-93827: Linux kernel virtio-fs - Use After Free"
description: "Linux kernel virtio-fs contains a double-free vulnerability caused by improper cleanup of fs->vqs and fs->mq_map pointers during failed queue setup in virtio_fs_setup_vqs(), letting attackers trigger double-free during probe failure cleanup, exploit requires a broken virtio-fs device advertising more request queues than supported."
url: https://panop.io/threat-heartbeat/CVE-2026-93827/
---

# CVE-2026-93827 Linux kernel virtio-fs - Use After Free

Linux kernel virtio-fs contains a double-free vulnerability caused by improper cleanup of fs->vqs and fs->mq\_map pointers during failed queue setup in virtio\_fs\_setup\_vqs(), letting attackers trigger double-free during probe failure cleanup, exploit requires a broken virtio-fs device advertising more request queues than supported.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.14% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93827)

## Details

Type

Use After Free

Impact

Denial Of Service

CVSS vector

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

Published

24 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for virtio-fs double-free issue.

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-2026-93827](https://nvd.nist.gov/vuln/detail/CVE-2026-93827)
- [https://git.kernel.org/stable/c/20ef4739b329bb09cff11dd2458795a50674658e](https://git.kernel.org/stable/c/20ef4739b329bb09cff11dd2458795a50674658e)
- [https://git.kernel.org/stable/c/3fbc5ee776fefbc6ea34d2518f1f5f90aa2e1dad](https://git.kernel.org/stable/c/3fbc5ee776fefbc6ea34d2518f1f5f90aa2e1dad)
- [https://git.kernel.org/stable/c/6af3330ec5d5fb8c06c04eb520a71cf73ea5a765](https://git.kernel.org/stable/c/6af3330ec5d5fb8c06c04eb520a71cf73ea5a765)

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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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