---
title: "CVE-2026-99237: Linux Kernel - Race Condition"
description: "Linux kernel contains a race condition in tracing subsystem caused by missing trace_types_lock during last boot data reset, letting concurrent readers cause double free and data corruption, exploit requires concurrent tracing readers."
url: https://panop.io/threat-heartbeat/CVE-2026-99237/
---

# CVE-2026-99237 Linux Kernel - Race Condition

Linux kernel contains a race condition in tracing subsystem caused by missing trace\_types\_lock during last boot data reset, letting concurrent readers cause double free and data corruption, exploit requires concurrent tracing readers.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-99237)

## Details

Type

Race Condition

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

2 November 2026

Updated

3 November 2026

## Vendor fix

Update to the latest Linux kernel version with the tracing subsystem 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-2026-99237](https://nvd.nist.gov/vuln/detail/CVE-2026-99237)
- [https://git.kernel.org/stable/c/1f06cfe0b60a878619d1d8efe1cd0f515b7dc2aa](https://git.kernel.org/stable/c/1f06cfe0b60a878619d1d8efe1cd0f515b7dc2aa)
- [https://git.kernel.org/stable/c/92b69f6db640dadc0851762ee2e12db99f083cad](https://git.kernel.org/stable/c/92b69f6db640dadc0851762ee2e12db99f083cad)
- [https://git.kernel.org/stable/c/d6d991afe775ab7fcf89523a2502b7ca3be56ffd](https://git.kernel.org/stable/c/d6d991afe775ab7fcf89523a2502b7ca3be56ffd)

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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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