CVE-2025-21776

USB: hub: Ignore non-compliant devices with too many configs or interfaces

State: Published
Severity: Not scored
Published: Feb 27, 2025
Updated: Oct 15, 2026
Reserved: Dec 29, 2024

Description

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

USB: hub: Ignore non-compliant devices with too many configs or interfaces

Robert Morris created a test program which can cause usb_hub_to_struct_hub() to dereference a NULL or inappropriate pointer:

Oops: general protection fault, probably for non-canonical address 0xcccccccccccccccc: 0000 [#1] SMP DEBUG_PAGEALLOC PTI CPU: 7 UID: 0 PID: 117 Comm: kworker/7:1 Not tainted 6.13.0-rc3-00017-gf44d154d6e3d #14 Hardware name: FreeBSD BHYVE/BHYVE, BIOS 14.0 10/17/2021 Workqueue: usb_hub_wq hub_event RIP: 0010:usb_hub_adjust_deviceremovable+0x78/0x110 ... Call Trace: <TASK> ? die_addr+0x31/0x80 ? exc_general_protection+0x1b4/0x3c0 ? asm_exc_general_protection+0x26/0x30 ? usb_hub_adjust_deviceremovable+0x78/0x110 hub_probe+0x7c7/0xab0 usb_probe_interface+0x14b/0x350 really_probe+0xd0/0x2d0 ? __pfx___device_attach_driver+0x10/0x10 __driver_probe_device+0x6e/0x110 driver_probe_device+0x1a/0x90 __device_attach_driver+0x7e/0xc0 bus_for_each_drv+0x7f/0xd0 __device_attach+0xaa/0x1a0 bus_probe_device+0x8b/0xa0 device_add+0x62e/0x810 usb_set_configuration+0x65d/0x990 usb_generic_driver_probe+0x4b/0x70 usb_probe_device+0x36/0xd0

The cause of this error is that the device has two interfaces, and the hub driver binds to interface 1 instead of interface 0, which is where usb_hub_to_struct_hub() looks.

We can prevent the problem from occurring by refusing to accept hub devices that violate the USB spec by having more than one configuration or interface.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before 49f077106fa07919a6a6dda99bb490dd1d1a8218Affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before d343fe0fad5c1d689775f2dda24a85ce98e29566Affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before d3a67adb365cdfdac4620daf38a82e57ca45806cAffected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before c3720b04df84b5459050ae4e03ec7d545652f897Affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before e905a0fca7bff0855d312c16f71e60e1773b393eAffected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before 62d8f4c5454dd39aded4f343720d1c5a1803cfefAffected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before 5b9778e1fe715700993ce436c152dc3b7df0b490Affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before 2240fed37afbcdb5e8b627bc7ad986891100e05dAffected
LinuxLinux	3.9Affected before 3.9Not affected 5.4.291 through 5.4.Not affected 5.10.235 through 5.10.Not affected 5.15.179 through 5.15.Not affected 6.1.129 through 6.1.Not affected 6.6.79 through 6.6.Not affected 6.12.16 through 6.12.Not affected 6.13.4 through 6.13.*Not affected 6.14 and laterNot affected

Product

Versions

LinuxLinux

d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before 49f077106fa07919a6a6dda99bb490dd1d1a8218Affected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before d343fe0fad5c1d689775f2dda24a85ce98e29566Affected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before d3a67adb365cdfdac4620daf38a82e57ca45806cAffected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before c3720b04df84b5459050ae4e03ec7d545652f897Affected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before e905a0fca7bff0855d312c16f71e60e1773b393eAffected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before 62d8f4c5454dd39aded4f343720d1c5a1803cfefAffected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before 5b9778e1fe715700993ce436c152dc3b7df0b490Affected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 to before 2240fed37afbcdb5e8b627bc7ad986891100e05dAffected

LinuxLinux

3.9Affected
before 3.9Not affected
5.4.291 through 5.4.*Not affected
5.10.235 through 5.10.*Not affected
5.15.179 through 5.15.*Not affected
6.1.129 through 6.1.*Not affected
6.6.79 through 6.6.*Not affected
6.12.16 through 6.12.*Not affected
6.13.4 through 6.13.*Not affected
6.14 and laterNot affected

References

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