CVE-2026-64478

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

State: Published
Severity: Not scored
Published: Jul 25, 2026
Updated: Aug 17, 2026
Reserved: Jul 19, 2026

Description

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 kobject_get_path() walks ancestor kobjects and dereferences their names; if the USB device kobject name is no longer valid, this can fault in strlen():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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	d0b0264009596c07a77d82808b0dae72bc04ac5c to before e4c66a149c408e44e60bfec3fabf08b6b7abbc60Affected b4b94f092f193d7a2db8e82af5e51519ae89963c to before 4566bf8ae9dbfe81bdc2ff1702d59db8a233b06eAffected c2d5b0a6c688ffb32c35627e337fbbcc65bc275f to before 662a1d7b5affc424ea4f4bc20dd99be29e687886Affected d04d301614630724feb4048bf17432fc7964fe74 to before a47ecd904c51ae6a42957feb3cf2f4266adee2e5Affected a705899ec6085b12a33aa0fd94a58e82e9e90502 to before c1da6d3f45036fa63672ee04ad97cb526b40b987Affected 79d561c4ec0497669f19a9550cfb74812f60938b to before a263eb12cbe2e208e6e637df0f9b0be9a484158eAffected 79d561c4ec0497669f19a9550cfb74812f60938b to before 4246dd043b7a4f8e3bc1d2896e81d11220610edaAffected 79d561c4ec0497669f19a9550cfb74812f60938b to before 7693c0cc415f3a16a7a3355f245474a5e661be4eAffected 104ad9bae11ee450fb7d0595ff7876cfb6527838Affected 0105cfc41abeb428d4405951a20e1e239bea5e1dAffected 5.10.245 to before 5.10.261Affected 5.15.194 to before 5.15.212Affected 6.1.155 to before 6.1.178Affected 6.6.109 to before 6.6.145Affected 6.12.50 to before 6.12.96Affected 5.4.300 to before 5.5Affected 6.16.10 to before 6.17Affected
LinuxLinux	6.17Affected before 6.17Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.96 through 6.12.Not affected 6.18.39 through 6.18.Not affected 7.1.4 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

d0b0264009596c07a77d82808b0dae72bc04ac5c to before e4c66a149c408e44e60bfec3fabf08b6b7abbc60Affected
b4b94f092f193d7a2db8e82af5e51519ae89963c to before 4566bf8ae9dbfe81bdc2ff1702d59db8a233b06eAffected
c2d5b0a6c688ffb32c35627e337fbbcc65bc275f to before 662a1d7b5affc424ea4f4bc20dd99be29e687886Affected
d04d301614630724feb4048bf17432fc7964fe74 to before a47ecd904c51ae6a42957feb3cf2f4266adee2e5Affected
a705899ec6085b12a33aa0fd94a58e82e9e90502 to before c1da6d3f45036fa63672ee04ad97cb526b40b987Affected
79d561c4ec0497669f19a9550cfb74812f60938b to before a263eb12cbe2e208e6e637df0f9b0be9a484158eAffected
79d561c4ec0497669f19a9550cfb74812f60938b to before 4246dd043b7a4f8e3bc1d2896e81d11220610edaAffected
79d561c4ec0497669f19a9550cfb74812f60938b to before 7693c0cc415f3a16a7a3355f245474a5e661be4eAffected
104ad9bae11ee450fb7d0595ff7876cfb6527838Affected
0105cfc41abeb428d4405951a20e1e239bea5e1dAffected
5.10.245 to before 5.10.261Affected
5.15.194 to before 5.15.212Affected
6.1.155 to before 6.1.178Affected
6.6.109 to before 6.6.145Affected
6.12.50 to before 6.12.96Affected
5.4.300 to before 5.5Affected
6.16.10 to before 6.17Affected

LinuxLinux

6.17Affected
before 6.17Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.96 through 6.12.*Not affected
6.18.39 through 6.18.*Not affected
7.1.4 through 7.1.*Not affected
7.2 and laterNot affected

References

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