---
title: "CVE-2026-89553: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability caused by a race condition between info ioctl vma lookup and gem close path in nouveau/gem, letting attackers cause memory corruption, exploit requires race condition timing."
url: https://panop.io/threat-heartbeat/CVE-2026-89553/
---

# CVE-2026-89553 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by a race condition between info ioctl vma lookup and gem close path in nouveau/gem, letting attackers cause memory corruption, exploit requires race condition timing.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.13% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89553)

## Details

Type

Use After Free

Impact

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 with the patch for nouveau/gem race condition.

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-2026-89553](https://nvd.nist.gov/vuln/detail/CVE-2026-89553)
- [https://git.kernel.org/stable/c/208867763843aa82efcbe3b771f1b8e6c7aa820a](https://git.kernel.org/stable/c/208867763843aa82efcbe3b771f1b8e6c7aa820a)
- [https://git.kernel.org/stable/c/5e17160d41d92823f3379c1982e1369680c5ce4d](https://git.kernel.org/stable/c/5e17160d41d92823f3379c1982e1369680c5ce4d)
- [https://git.kernel.org/stable/c/e60466011ac3a6b8045e6cc3c2cbb30d58039d2e](https://git.kernel.org/stable/c/e60466011ac3a6b8045e6cc3c2cbb30d58039d2e)
- [https://git.kernel.org/stable/c/ff110e85837d7ecd83f36078107be240ff5ae409](https://git.kernel.org/stable/c/ff110e85837d7ecd83f36078107be240ff5ae409)
- [https://git.kernel.org/stable/c/e05c28bd6043d0fd0bea9c3fc49300a8871a1a81](https://git.kernel.org/stable/c/e05c28bd6043d0fd0bea9c3fc49300a8871a1a81)

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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

Panop answers these inside your environment, for this CVE and every other finding.

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