---
title: "CVE-2026-99235: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability in tracing subsystem caused by saving a compatible histogram pointer instead of the event file, letting attackers cause kernel memory corruption, exploit requires kernel tracing usage."
url: https://panop.io/threat-heartbeat/CVE-2026-99235/
---

# CVE-2026-99235 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in tracing subsystem caused by saving a compatible histogram pointer instead of the event file, letting attackers cause kernel memory corruption, exploit requires kernel tracing usage.

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-2026-99235)

## Details

Type

Use After Free

Impact

Denial Of Service, Privilege Escalation

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 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-2026-99235](https://nvd.nist.gov/vuln/detail/CVE-2026-99235)
- [https://git.kernel.org/stable/c/173914501b97236d7ea7dc2af7f30feddd4e1436](https://git.kernel.org/stable/c/173914501b97236d7ea7dc2af7f30feddd4e1436)
- [https://git.kernel.org/stable/c/3609ada3c12cecfb0ae5ee82ef4f86c5f18a2dea](https://git.kernel.org/stable/c/3609ada3c12cecfb0ae5ee82ef4f86c5f18a2dea)
- [https://git.kernel.org/stable/c/7a111ba0d1b74c99bc8f096565dc71945f694254](https://git.kernel.org/stable/c/7a111ba0d1b74c99bc8f096565dc71945f694254)
- [https://git.kernel.org/stable/c/7cafc82e6153f05a221be678cd649d02e06ba909](https://git.kernel.org/stable/c/7cafc82e6153f05a221be678cd649d02e06ba909)
- [https://git.kernel.org/stable/c/8b307d64a60548e4a74cb746f74d7ed4bd49965e](https://git.kernel.org/stable/c/8b307d64a60548e4a74cb746f74d7ed4bd49965e)
- [https://git.kernel.org/stable/c/9631dbccd3c649b567a5aafffea6b00634183997](https://git.kernel.org/stable/c/9631dbccd3c649b567a5aafffea6b00634183997)
- [https://git.kernel.org/stable/c/a6165126b1a1b26342b55be6eb6ee23af8756aba](https://git.kernel.org/stable/c/a6165126b1a1b26342b55be6eb6ee23af8756aba)
- [https://git.kernel.org/stable/c/ac815a379644b2ad5008a009a3516ada31b5dd82](https://git.kernel.org/stable/c/ac815a379644b2ad5008a009a3516ada31b5dd82)

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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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