---
title: "CVE-2026-93122: Linux Kernel usb gadget UAC - Out of Bounds Write"
description: "Linux kernel usb gadget UAC1 and UAC2 configfs rate-list attributes contain a buffer overflow caused by lack of validation on rate list length before storing, letting attackers write out-of-bounds in fixed-size arrays, exploit requires writing more than ten rates."
url: https://panop.io/threat-heartbeat/CVE-2026-93122/
---

# CVE-2026-93122 Linux Kernel usb gadget UAC - Out of Bounds Write

Linux kernel usb gadget UAC1 and UAC2 configfs rate-list attributes contain a buffer overflow caused by lack of validation on rate list length before storing, letting attackers write out-of-bounds in fixed-size arrays, exploit requires writing more than ten rates.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93122)

## Details

Type

Out of Bounds Write

Impact

Denial Of Service

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 with the fix for rate list length validation.

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-2026-93122](https://nvd.nist.gov/vuln/detail/CVE-2026-93122)
- [https://git.kernel.org/stable/c/3819c6f255a37c4d085ce9f264f9f11bf3c2c6bb](https://git.kernel.org/stable/c/3819c6f255a37c4d085ce9f264f9f11bf3c2c6bb)
- [https://git.kernel.org/stable/c/844d83d5964b87919b958ff48405188c6ddae9cc](https://git.kernel.org/stable/c/844d83d5964b87919b958ff48405188c6ddae9cc)
- [https://git.kernel.org/stable/c/0203146ad450932c2d3132e367a99c49efe3122d](https://git.kernel.org/stable/c/0203146ad450932c2d3132e367a99c49efe3122d)

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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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