---
title: "CVE-2026-90429: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability caused by unsynchronized access to cmdqv->vintfs[] slots in iommu/tegra241-cmdqv error ISR, letting attackers cause NULL dereference or use-after-free, exploit requires concurrent error interrupts."
url: https://panop.io/threat-heartbeat/CVE-2026-90429/
---

# CVE-2026-90429 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by unsynchronized access to cmdqv->vintfs\[\] slots in iommu/tegra241-cmdqv error ISR, letting attackers cause NULL dereference or use-after-free, exploit requires concurrent error interrupts.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90429)

## Details

Type

Use After Free

Impact

Denial Of Service, Remote Code Execution

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for iommu/tegra241-cmdqv synchronization.

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-2026-90429](https://nvd.nist.gov/vuln/detail/CVE-2026-90429)
- [https://git.kernel.org/stable/c/a491be376abd1c80a314cdd658632c85cd660b73](https://git.kernel.org/stable/c/a491be376abd1c80a314cdd658632c85cd660b73)
- [https://git.kernel.org/stable/c/bcb82407633c3008362ad927699d985ee4981557](https://git.kernel.org/stable/c/bcb82407633c3008362ad927699d985ee4981557)
- [https://git.kernel.org/stable/c/f3ef4abc271a1d3d7b6715879e149c286dc8aae7](https://git.kernel.org/stable/c/f3ef4abc271a1d3d7b6715879e149c286dc8aae7)

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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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