---
title: "CVE-2026-89747: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability in trace_pipe caused by sub-buffer order change during ring buffer read, letting local attackers cause memory corruption, exploit requires concurrent trace_pipe reading and sub-buffer order change."
url: https://panop.io/threat-heartbeat/CVE-2026-89747/
---

# CVE-2026-89747 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in trace\_pipe caused by sub-buffer order change during ring buffer read, letting local attackers cause memory corruption, exploit requires concurrent trace\_pipe reading and sub-buffer order change.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89747)

## Details

Type

Use After Free

CVSS vector

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

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for trace\_pipe use-after-free.

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-2026-89747](https://nvd.nist.gov/vuln/detail/CVE-2026-89747)
- [https://git.kernel.org/stable/c/ddbe921ed16a0ad2d9e09574c3f3aabec7528325](https://git.kernel.org/stable/c/ddbe921ed16a0ad2d9e09574c3f3aabec7528325)
- [https://git.kernel.org/stable/c/05ebe1e1d7d38c2612bacfefe043a33572ae34cb](https://git.kernel.org/stable/c/05ebe1e1d7d38c2612bacfefe043a33572ae34cb)
- [https://git.kernel.org/stable/c/372f8534244d632ad5118e8a87a11291b01712d3](https://git.kernel.org/stable/c/372f8534244d632ad5118e8a87a11291b01712d3)
- [https://git.kernel.org/stable/c/7a49d19ff9baaf61217e5ec14199c18bc2d93ee4](https://git.kernel.org/stable/c/7a49d19ff9baaf61217e5ec14199c18bc2d93ee4)

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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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