CVE-2026-64478

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 kobject_get_path() walks ancestor kobjects and dereferences their names; if the USB device kobject name is no longer valid, this can fault in strlen():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

VendorProductVersion RangeStatus
LinuxLinuxd0b0264009596c07a77d82808b0dae72bc04ac5c < e4c66a149c408e44e60bfec3fabf08b6b7abbc60affected
LinuxLinuxb4b94f092f193d7a2db8e82af5e51519ae89963c < 4566bf8ae9dbfe81bdc2ff1702d59db8a233b06eaffected
LinuxLinuxc2d5b0a6c688ffb32c35627e337fbbcc65bc275f < 662a1d7b5affc424ea4f4bc20dd99be29e687886affected
LinuxLinuxd04d301614630724feb4048bf17432fc7964fe74 < a47ecd904c51ae6a42957feb3cf2f4266adee2e5affected
LinuxLinuxa705899ec6085b12a33aa0fd94a58e82e9e90502 < c1da6d3f45036fa63672ee04ad97cb526b40b987affected
LinuxLinux79d561c4ec0497669f19a9550cfb74812f60938b < a263eb12cbe2e208e6e637df0f9b0be9a484158eaffected
LinuxLinux79d561c4ec0497669f19a9550cfb74812f60938b < 4246dd043b7a4f8e3bc1d2896e81d11220610edaaffected
LinuxLinux79d561c4ec0497669f19a9550cfb74812f60938b < 7693c0cc415f3a16a7a3355f245474a5e661be4eaffected
LinuxLinux104ad9bae11ee450fb7d0595ff7876cfb6527838affected
LinuxLinux0105cfc41abeb428d4405951a20e1e239bea5e1daffected
LinuxLinux5.10.245 < 5.10.261affected
LinuxLinux5.15.194 < 5.15.212affected
LinuxLinux6.1.155 < 6.1.178affected
LinuxLinux6.6.109 < 6.6.145affected
LinuxLinux6.12.50 < 6.12.96affected
LinuxLinux5.4.300 < 5.5affected
LinuxLinux6.16.10 < 6.17affected
LinuxLinux6.17affected
LinuxLinux0 < 6.17unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.96 <= 6.12.*unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References