---
title: "CVE-2026-90291: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability caused by improper lifecycle management of kmod_dup_req instances in module/dups, letting local attackers cause memory corruption, exploit requires concurrent access to kmod_dup_req."
url: https://panop.io/threat-heartbeat/CVE-2026-90291/
---

# CVE-2026-90291 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by improper lifecycle management of kmod\_dup\_req instances in module/dups, letting local attackers cause memory corruption, exploit requires concurrent access to kmod\_dup\_req.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90291)

## Details

Type

Use After Free

Impact

Denial Of Service, Remote Code Execution

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix for kmod\_dup\_req lifecycle management.

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-2026-90291](https://nvd.nist.gov/vuln/detail/CVE-2026-90291)
- [https://git.kernel.org/stable/c/2c85e0fb528e039aa8ea1e9c2a1f64347f990541](https://git.kernel.org/stable/c/2c85e0fb528e039aa8ea1e9c2a1f64347f990541)
- [https://git.kernel.org/stable/c/5eecb11b543f9f417bcf0dea239ff99c6af65dbd](https://git.kernel.org/stable/c/5eecb11b543f9f417bcf0dea239ff99c6af65dbd)
- [https://git.kernel.org/stable/c/b2709aad7599f6fd957939b60f4a8323c8f08072](https://git.kernel.org/stable/c/b2709aad7599f6fd957939b60f4a8323c8f08072)
- [https://git.kernel.org/stable/c/cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca](https://git.kernel.org/stable/c/cd2396fc9684d2cfd3f3c3f09c79d6d9d725b0ca)

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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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