---
title: "CVE-2026-99224: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability caused by improper handling of key type name during key description formatting in keyctl_describe_key(), letting local attackers cause kernel faults or crashes, exploit requires module unload race condition."
url: https://panop.io/threat-heartbeat/CVE-2026-99224/
---

# CVE-2026-99224 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by improper handling of key type name during key description formatting in keyctl\_describe\_key(), letting local attackers cause kernel faults or crashes, exploit requires module unload race condition.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-99224)

## Details

Type

Use After Free

Impact

Denial Of Service

CVSS vector

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

Published

2 November 2026

Updated

3 November 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for keyctl\_describe\_key() key type name handling.

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-2026-99224](https://nvd.nist.gov/vuln/detail/CVE-2026-99224)
- [https://git.kernel.org/stable/c/3c3cfd9e262afc9558c38f8cec57f09d10988546](https://git.kernel.org/stable/c/3c3cfd9e262afc9558c38f8cec57f09d10988546)
- [https://git.kernel.org/stable/c/6b613747f7ea309ada5b8d05b55398c338f7a968](https://git.kernel.org/stable/c/6b613747f7ea309ada5b8d05b55398c338f7a968)
- [https://git.kernel.org/stable/c/916667df7695366f23cfaf365b5840b228cc4b2e](https://git.kernel.org/stable/c/916667df7695366f23cfaf365b5840b228cc4b2e)
- [https://git.kernel.org/stable/c/a49e6c9a1a5b3457c946a8efb616ce13b4ca8194](https://git.kernel.org/stable/c/a49e6c9a1a5b3457c946a8efb616ce13b4ca8194)
- [https://git.kernel.org/stable/c/dddd3a1ab7d12ee163477918ff6eb943361db4fe](https://git.kernel.org/stable/c/dddd3a1ab7d12ee163477918ff6eb943361db4fe)
- [https://git.kernel.org/stable/c/dea367df18e3a4faac393e3a4e818ee03af89b19](https://git.kernel.org/stable/c/dea367df18e3a4faac393e3a4e818ee03af89b19)
- [https://git.kernel.org/stable/c/0461bc8f91116aae4a020e15f4e1c1fd535ab35e](https://git.kernel.org/stable/c/0461bc8f91116aae4a020e15f4e1c1fd535ab35e)
- [https://git.kernel.org/stable/c/19c4de819e52b7f606468fbfe4fcef4e812e2777](https://git.kernel.org/stable/c/19c4de819e52b7f606468fbfe4fcef4e812e2777)

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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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