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CVE-2026-64478

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Last modified

CVE-2026-64478 is a vulnerability of currently unknown severity. 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.

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 kobject_get_path() walks ancestor kobjects and dereferences their names; if the USB device kobject name is no longer valid, this can fault in strlen(): RIP: 0010:strlen+0x10/0x30 Call Trace: kobject_get_path+0x34/0x150 snd_dualsense_ih_match+0x49/0xd0 [snd_usb_audio]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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= d0b0264009596c07a77d82808b0dae72bc04ac5c, < e4c66a149c408e44e60bfec3fabf08b6b7abbc60; >= b4b94f092f193d7a2db8e82af5e51519ae89963c, < 4566bf8ae9dbfe81bdc2ff1702d59db8a233b06e; >= c2d5b0a6c688ffb32c35627e337fbbcc65bc275f, < 662a1d7b5affc424ea4f4bc20dd99be29e687886; >= d04d301614630724feb4048bf17432fc7964fe74, < a47ecd904c51ae6a42957feb3cf2f4266adee2e5; >= a705899ec6085b12a33aa0fd94a58e82e9e90502, < c1da6d3f45036fa63672ee04ad97cb526b40b987; >= 79d561c4ec0497669f19a9550cfb74812f60938b, < a263eb12cbe2e208e6e637df0f9b0be9a484158e; >= 79d561c4ec0497669f19a9550cfb74812f60938b, < 4246dd043b7a4f8e3bc1d2896e81d11220610eda; >= 79d561c4ec0497669f19a9550cfb74812f60938b, < 7693c0cc415f3a16a7a3355f245474a5e661be4e; 104ad9bae11ee450fb7d0595ff7876cfb6527838; 0105cfc41abeb428d4405951a20e1e239bea5e1d; >= 5.10.245, < 5.10.261; >= 5.15.194, < 5.15.212; >= 6.1.155, < 6.1.178; >= 6.6.109, < 6.6.145; >= 6.12.50, < 6.12.96; >= 5.4.300, < 5.5; >= 6.16.10, < 6.17
LinuxLinux6.17

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-64478?
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.
How severe is CVE-2026-64478?
Severity scoring for CVE-2026-64478 is pending analysis.
How do I fix CVE-2026-64478?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST