---
id: CVE-2026-64478
title: 'ALSA: usb-audio: avoid kobject path lookup in DualSense match'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usb-audio: avoid kobject path lookup in DualSense match

  The DualSense jack-detection input handler verifies that a matching input
  device belongs to the same phys…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d0b0264009596c07a77d82808b0dae72bc04ac5c <
    e4c66a149c408e44e60bfec3fabf08b6b7abbc60
  - >-
    Linux >= b4b94f092f193d7a2db8e82af5e51519ae89963c <
    4566bf8ae9dbfe81bdc2ff1702d59db8a233b06e
  - >-
    Linux >= c2d5b0a6c688ffb32c35627e337fbbcc65bc275f <
    662a1d7b5affc424ea4f4bc20dd99be29e687886
  - >-
    Linux >= d04d301614630724feb4048bf17432fc7964fe74 <
    a47ecd904c51ae6a42957feb3cf2f4266adee2e5
  - >-
    Linux >= a705899ec6085b12a33aa0fd94a58e82e9e90502 <
    c1da6d3f45036fa63672ee04ad97cb526b40b987
  - >-
    Linux >= 79d561c4ec0497669f19a9550cfb74812f60938b <
    a263eb12cbe2e208e6e637df0f9b0be9a484158e
  - >-
    Linux >= 79d561c4ec0497669f19a9550cfb74812f60938b <
    4246dd043b7a4f8e3bc1d2896e81d11220610eda
  - >-
    Linux >= 79d561c4ec0497669f19a9550cfb74812f60938b <
    7693c0cc415f3a16a7a3355f245474a5e661be4e
  - Linux 104ad9bae11ee450fb7d0595ff7876cfb6527838
  - Linux 0105cfc41abeb428d4405951a20e1e239bea5e1d
  - Linux >= 5.10.245 < 5.10.261
  - Linux >= 5.15.194 < 5.15.212
  - Linux >= 6.1.155 < 6.1.178
  - Linux >= 6.6.109 < 6.6.145
  - Linux >= 6.12.50 < 6.12.96
  - Linux >= 5.4.300 < 5.5
  - Linux >= 6.16.10 < 6.17
  - Linux 6.17
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:39:50.444032Z'
published: '2026-07-25'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:44:54.685Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-64478'
references:
  - url: 'https://git.kernel.org/stable/c/e4c66a149c408e44e60bfec3fabf08b6b7abbc60'
  - url: 'https://git.kernel.org/stable/c/4566bf8ae9dbfe81bdc2ff1702d59db8a233b06e'
  - url: 'https://git.kernel.org/stable/c/662a1d7b5affc424ea4f4bc20dd99be29e687886'
  - url: 'https://git.kernel.org/stable/c/a47ecd904c51ae6a42957feb3cf2f4266adee2e5'
  - url: 'https://git.kernel.org/stable/c/c1da6d3f45036fa63672ee04ad97cb526b40b987'
  - url: 'https://git.kernel.org/stable/c/a263eb12cbe2e208e6e637df0f9b0be9a484158e'
  - url: 'https://git.kernel.org/stable/c/4246dd043b7a4f8e3bc1d2896e81d11220610eda'
  - url: 'https://git.kernel.org/stable/c/7693c0cc415f3a16a7a3355f245474a5e661be4e'
tags:
  - cve.org
epss: 0.00184
epssPercentile: 0.08083
ingestedAt: '2026-11-06T16:57:43.167Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

ALSA: usb-audio: avoid kobject path lookup in DualSense match

The DualSense jack-detection input handler verifies that a matching input
device belongs to the same physical controller by building kobject path
strings for both the input device and the USB audio device, then comparing
the path prefix.

This was observed when a weak physical connection caused the controller
to rapidly disconnect and reconnect. During that repeated hotplug,
snd_dualsense_ih_match() can run while the controller's USB device is
being disconnected. kobject_get_path() walks ancestor kobjects and
dereferences their names; if the USB device kobject name is no longer
valid, this can fault in strlen():

  RIP: 0010:strlen+0x10/0x30
  Call Trace:
   kobject_get_path+0x34/0x150
   snd_dualsense_ih_match+0x49/0xd0 [snd_usb_audio]
   input_register_device+0x566/0x6a0
   ps_probe+0xb89/0x1590 [hid_playstation]

The same ownership check can be done without building kobject path
strings. The input device is parented below the HID device, USB interface
and USB device, so walking the input device parent chain and comparing
against the mixer USB device preserves the check without dereferencing
kobject names during disconnect.

## Affected

- `Linux >= d0b0264009596c07a77d82808b0dae72bc04ac5c < e4c66a149c408e44e60bfec3fabf08b6b7abbc60`
- `Linux >= b4b94f092f193d7a2db8e82af5e51519ae89963c < 4566bf8ae9dbfe81bdc2ff1702d59db8a233b06e`
- `Linux >= c2d5b0a6c688ffb32c35627e337fbbcc65bc275f < 662a1d7b5affc424ea4f4bc20dd99be29e687886`
- `Linux >= d04d301614630724feb4048bf17432fc7964fe74 < a47ecd904c51ae6a42957feb3cf2f4266adee2e5`
- `Linux >= a705899ec6085b12a33aa0fd94a58e82e9e90502 < c1da6d3f45036fa63672ee04ad97cb526b40b987`
- `Linux >= 79d561c4ec0497669f19a9550cfb74812f60938b < a263eb12cbe2e208e6e637df0f9b0be9a484158e`
- `Linux >= 79d561c4ec0497669f19a9550cfb74812f60938b < 4246dd043b7a4f8e3bc1d2896e81d11220610eda`
- `Linux >= 79d561c4ec0497669f19a9550cfb74812f60938b < 7693c0cc415f3a16a7a3355f245474a5e661be4e`
- `Linux 104ad9bae11ee450fb7d0595ff7876cfb6527838`
- `Linux 0105cfc41abeb428d4405951a20e1e239bea5e1d`
- `Linux >= 5.10.245 < 5.10.261`
- `Linux >= 5.15.194 < 5.15.212`
- `Linux >= 6.1.155 < 6.1.178`
- `Linux >= 6.6.109 < 6.6.145`
- `Linux >= 6.12.50 < 6.12.96`
- `Linux >= 5.4.300 < 5.5`
- `Linux >= 6.16.10 < 6.17`
- `Linux 6.17`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.