---
title: "CVE-2026-90425: Linux Kernel - Logic Flaw in Stream ID Mapping"
description: "Linux kernel iommu/tegra241-cmdqv contains a logic flaw caused by improper handling of devices with multiple or zero Stream IDs in tegra241_vintf_init_vsid(), letting attackers cause invalid guest vSID mappings and out-of-bounds reads, exploit requires device with incorrect stream count."
url: https://panop.io/threat-heartbeat/CVE-2026-90425/
---

# CVE-2026-90425 Linux Kernel - Logic Flaw in Stream ID Mapping

Linux kernel iommu/tegra241-cmdqv contains a logic flaw caused by improper handling of devices with multiple or zero Stream IDs in tegra241\_vintf\_init\_vsid(), letting attackers cause invalid guest vSID mappings and out-of-bounds reads, exploit requires device with incorrect stream count.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90425)

## Details

Type

Logic Flaw in Stream ID Mapping

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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.

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-2026-90425](https://nvd.nist.gov/vuln/detail/CVE-2026-90425)
- [https://git.kernel.org/stable/c/0b139ec4641c7d4163d8e345c26cc630e24fa43b](https://git.kernel.org/stable/c/0b139ec4641c7d4163d8e345c26cc630e24fa43b)
- [https://git.kernel.org/stable/c/9b37afb2d34d99ec4f8db28134181b5a8ec9a4a5](https://git.kernel.org/stable/c/9b37afb2d34d99ec4f8db28134181b5a8ec9a4a5)
- [https://git.kernel.org/stable/c/fb292bfc9be936dade7eef7ec5762de1201983d8](https://git.kernel.org/stable/c/fb292bfc9be936dade7eef7ec5762de1201983d8)

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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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