---
title: "CVE-2026-90002: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability caused by a race condition in ftrace_ops reference handling in trace instance files set_ftrace_filter and set_ftrace_notrace, letting attackers cause kernel crash, exploit requires concurrent rmdir and file open operations."
url: https://panop.io/threat-heartbeat/CVE-2026-90002/
---

# CVE-2026-90002 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by a race condition in ftrace\_ops reference handling in trace instance files set\_ftrace\_filter and set\_ftrace\_notrace, letting attackers cause kernel crash, exploit requires concurrent rmdir and file open operations.

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-2026-90002)

## Details

Type

Use After Free

Impact

Denial Of Service

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## 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-2026-90002](https://nvd.nist.gov/vuln/detail/CVE-2026-90002)
- [https://git.kernel.org/stable/c/83fd7eca5ab0d3ac3f23bff889175d847e21af06](https://git.kernel.org/stable/c/83fd7eca5ab0d3ac3f23bff889175d847e21af06)
- [https://git.kernel.org/stable/c/9100191e5acb2e5ea2313f436667bb5fce129f47](https://git.kernel.org/stable/c/9100191e5acb2e5ea2313f436667bb5fce129f47)
- [https://git.kernel.org/stable/c/cee8f286794df916553d8d445eac5c323ec5b0f8](https://git.kernel.org/stable/c/cee8f286794df916553d8d445eac5c323ec5b0f8)
- [https://git.kernel.org/stable/c/177cd8966325f0ffffa3c9381f9e0422019a3973](https://git.kernel.org/stable/c/177cd8966325f0ffffa3c9381f9e0422019a3973)

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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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